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440 results on '"Photonics Research Group"'

51. All-Optical Reservoir Computing on a Photonic Chip Using Silicon-Based Ring Resonators

Author: Florian Denis-le Coarer, Matthias Freiberger, Peter Bienstman, Damien Rontani, Marc Sciamanna, Joni Dambre, Andrew Katumba, Chaire Photonique, Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL)-CentraleSupélec-Université de Lorraine (UL), CentraleSupélec-Université de Lorraine (UL), Photonics Research Group, Department of Information Technology (INTEC), Universiteit Gent = Ghent University [Belgium] (UGENT)-Universiteit Gent = Ghent University [Belgium] (UGENT), Internet Technology and Data Science Lab (IDLab), Universiteit Antwerpen [Antwerpen]-Universiteit Gent = Ghent University [Belgium] (UGENT), Fondation Supelec,Préfecture de Région Grand-EstMetz MétropoleDépartement de la Moselle, AIRBUS GDI Simulation, through the funding of the Chair in Photonics and PIANO project., BELSPO IAP P7-35 program Photonics@be AFOSR (grant No. FA-9550-15-1-0279 and FA9550-17-1-0072), European Project: 688579,H2020,H2020-ICT-2015,PHRESCO(2015), Laboratoire matériaux organiques à propriétés spécifiques ( LMOPS ), Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces ( LEPMI ), Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut National Polytechnique de Grenoble ( INPG ) -Université Savoie Mont Blanc ( USMB [Université de Savoie] [Université de Chambéry] ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut National Polytechnique de Grenoble ( INPG ) -Université Savoie Mont Blanc ( USMB [Université de Savoie] [Université de Chambéry] ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Matériaux Optiques, Photonique et Systèmes ( LMOPS ), CentraleSupélec-Université de Lorraine ( UL ) -CentraleSupélec-Université de Lorraine ( UL ), CentraleSupélec-Université de Lorraine ( UL ), Department of Information Technology ( INTEC ), Ghent University [Belgium] ( UGENT ) -Ghent University [Belgium] ( UGENT ), Internet Technology and Data Science Lab ( IDLab ), Universiteit Antwerpen [Antwerpen]-Ghent University [Belgium] ( UGENT ), European Project : 688579,H2020,H2020-ICT-2015,PHRESCO ( 2015 ), Universiteit Gent = Ghent University (UGENT)-Universiteit Gent = Ghent University (UGENT), and Universiteit Antwerpen = University of Antwerpen [Antwerpen]-Universiteit Gent = Ghent University (UGENT)
Subjects: Silicon, Nonlinear optics, Technology and Engineering, Bistability, SELF-PULSATION, Silicon photonics, Optical ring resonators, 02 engineering and technology, Topology, 01 natural sciences, law.invention, 010309 optics, Resonator, [SPI]Engineering Sciences [physics], law, BISTABILITY, SYSTEMS, 0103 physical sciences, [ SPI ] Engineering Sciences [physics], Resonators, [NLIN]Nonlinear Sciences [physics], Electrical and Electronic Engineering, Ring resonators, Reservoir computing, Physics, [PHYS]Physics [physics], [ PHYS ] Physics [physics], silicon photonics, business.industry, [ NLIN ] Nonlinear Sciences [physics], 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, ring resonators, Optical waveguides, Nonlinear system, Photonics, FILTER, Reservoirs, NONLINEAR MICRORING RESONATORS, HARDWARE IMPLEMENTATION, 0210 nano-technology, business
Abstract: We present in our work numerical results on the performance of a $\mathbf {4 \times 4}$ swirl-topology photonic reservoir integrated on a silicon chip. Nonlinear microring resonators are used as nodes. We analyze the performance of such a reservoir on a classical nonlinear Boolean task (the delayed XOR task) for: various designs of the reservoir in terms of lengths of the waveguides between consecutive nodes, and various injection parameters (injected power and optical detuning). From this analysis, we find that this kind of reservoir can perform–for a large variety of parameters–the delayed XOR task at 20 Gb/s with bit error rates lower than $\mathbf {10^{-3}}$ and an averaged injection power lower than 2.5 mW.
Published: 2018
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52. Clinical impact of NK-cell reconstitution after reduced intensity conditioned unrelated cord blood transplantation in patients with acute myeloid leukemia: analysis of a prospective phase II multicenter trial on behalf of the Société Française de Greffe de Moelle Osseuse et Thérapie Cellulaire and Eurocord

Author: S. Vigouroux, L Souchet, Patrice Chevallier, Anne Sirvent, C-E. Bulabois, Faezeh Legrand, Laurence Clement, Jérôme Cornillon, S. Furst, Sébastien Maury, Vivien Béziat, J Lejeune, Bernard Rio, Sylvie Chevret, G Margueritte, Sylvie François, Karin Bilger, Vincent Vieillard, G. Michel, Madalina Uzunov, Gérard Socié, Marie-Cécile Michallet, Patrice Ceballos, V. Rocha, J.-O. Bay, N. Maillard, Charles Dauriac, I. Yakoub-Agha, Abla Achour, Anne Huynh, Stéphanie Nguyen, Institut des Matériaux Jean Rouxel (IMN), Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS), Role of intra-Clonal Heterogeneity and Leukemic environment in ThErapy Resistance of chronic leukemias - Clermont Auvergne (CHELTER), Université Clermont Auvergne (UCA), Centre Interdisciplinaire de Nanoscience de Marseille (CINaM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Semiconductor Photonics Research Group, Trinity College Dublin-Science Foundation Ireland-Enterprise Ireland-Higher Education Authority, Institut de Cancérologie de la Loire Lucien Neuwirth, Centre Hospitalier Universitaire de Saint-Etienne (CHU de Saint-Etienne), STMicroelectronics, Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Centre de Recherche Public Henri Tudor [Technoport] (CRP Henri Tudor), Centre de Recherche Public Henri-Tudor [Luxembourg] (CRP Henri-Tudor), Centre hospitalier universitaire de Poitiers (CHU Poitiers), Service d'hématologie [Hôpital Edouard Herriot - HCL], Hôpital Edouard Herriot [CHU - HCL], Hospices Civils de Lyon (HCL)-Hospices Civils de Lyon (HCL), Département de sismologie (DS (UMR_7580)), Université Paris Diderot - Paris 7 (UPD7)-IPG PARIS-Centre National de la Recherche Scientifique (CNRS), Service greffe de moelle osseuse, Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Université Paris Diderot - Paris 7 (UPD7)-Groupe Hospitalier Saint Louis - Lariboisière - Fernand Widal [Paris], Assistance publique - Hôpitaux de Paris (AP-HP) (APHP), Centre de Recherche Épidémiologie et Statistique Sorbonne Paris Cité (CRESS (U1153 / UMR_A_1125 / UMR_S_1153)), Institut National de la Recherche Agronomique (INRA)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris Descartes - Paris 5 (UPD5)-Université Sorbonne Paris Cité (USPC)-Institut National de la Santé et de la Recherche Médicale (INSERM), Service d'Hématologie, Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Hôtel Dieu, IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris Diderot - Paris 7 (UPD7)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de la Recherche Agronomique (INRA)-Université Paris Descartes - Paris 5 (UPD5)-Université Sorbonne Paris Cité (USPC), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Ecole Polytechnique de l'Université de Nantes (EPUN), Université de Nantes (UN)-Université de Nantes (UN), Role of intra-Clonal Heterogeneity and Leukemic environment in ThErapy Resistance of chronic leukemias (CHELTER), Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Université Paris Diderot - Paris 7 (UPD7)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Groupe Hospitalier Saint Louis - Lariboisière - Fernand Widal [Paris], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Université Paris Diderot - Paris 7 (UPD7)-Université Sorbonne Paris Cité (USPC)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de la Recherche Agronomique (INRA), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôtel Dieu, Université de Nantes (UN)-Université de Nantes (UN)-Ecole Polytechnique de l'Université de Nantes (EPUN), Université de Nantes (UN)-Université de Nantes (UN)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centre Hospitalier Universitaire de Saint-Etienne [CHU Saint-Etienne] (CHU ST-E), Université Paris Diderot - Paris 7 (UPD7)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS), and Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Université Paris Diderot - Paris 7 (UPD7)-Groupe Hospitalier Saint Louis - Lariboisière - Fernand Widal [Paris]
Subjects: Adult, Male, 0301 basic medicine, Transplantation Conditioning, Myeloid, Cord Blood Stem Cell Transplantation, Disease-Free Survival, 03 medical and health sciences, 0302 clinical medicine, hemic and lymphatic diseases, Multicenter trial, Humans, Medicine, Prospective Studies, Registries, ComputingMilieux_MISCELLANEOUS, Transplantation, business.industry, Myeloid leukemia, [SDV.MHEP.HEM]Life Sciences [q-bio]/Human health and pathology/Hematology, Recovery of Function, Hematology, Middle Aged, Allografts, medicine.disease, 3. Good health, Killer Cells, Natural, Survival Rate, Leukemia, Myeloid, Acute, Leukemia, Haematopoiesis, 030104 developmental biology, medicine.anatomical_structure, Immunology, Female, business, 030215 immunology
Abstract: Unrelated cord blood transplantation (UCBT) after a reduced intensity conditioning regimen (RIC) has extended the use of UCB in elderly patients and those with co-morbidities without an HLA-identical donor, although post-transplant relapse remains a concern in high-risk acute myeloid leukemia (AML) patients. HLA incompatibilities between donor and recipient might enhance the alloreactivity of natural killer (NK) cells after allogeneic hematopoietic stem-cell transplantation (HSCT). We studied the reconstitution of NK cells and KIR-L mismatch in 54 patients who underwent a RIC-UCBT for AML in CR in a prospective phase II clinical trial. After RIC-UCBT, NK cells displayed phenotypic features of both activation and immaturity. Restoration of their polyfunctional capacities depended on the timing of their acquisition of phenotypic markers of maturity. The incidence of treatment-related mortality (TRM) was correlated with low CD16 expression (P=0.043) and high HLA-DR expression (P=0.0008), whereas overall survival was associated with increased frequency of NK-cell degranulation (P=0.001). These features reflect a general impairment of the NK licensing process in HLA-mismatched HSCT and may aid the development of future strategies for selecting optimal UCB units and enhancing immune recovery.
Published: 2017
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53. Reduced-intensity and non-myeloablative allogeneic stem cell transplantation from alternative HLA-mismatched donors for Hodgkin lymphoma: a study by the French Society of Bone Marrow Transplantation and Cellular Therapy

Author: Jérôme Cornillon, Emmanuel Gyan, R. Tabrizi, Ibrahim Yakoub-Agha, Mauricette Michallet, L. Castagna, N. Maillard, Etienne Daguindau, Jeremy Delage, Pascal Turlure, Anne-Claire Gac, Jean-Louis Gauthier, Caroline Regny, Sébastien Maury, Anne Huynh, Yves Beguin, Federico Garnier, Gérard Socié, Mélanie Mercier, Stéphanie Nguyen, Jean-Valère Malfuson, Didier Blaise, Ambroise Marçais, Thierry Guillaume, Tony Marchand, J.-O. Bay, R. Peffault de Latour, Remy Dulery, Service de médecine gériatrique (CHU de Dijon - Centre gériatrique de Champmaillot - EHPAD), Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand ( CHU Dijon ), Service de Cardiologie [CHU de Dijon], University of Texas, Hôpital Saint-Louis, Assistance publique - Hôpitaux de Paris (AP-HP)-Université Paris Diderot - Paris 7 ( UPD7 ), Service hématologie Poitiers, CHU, Microenvironnement et cancer ( MiCa ), Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique ), Institut de l'Elevage, CHU Trousseau [Tours], CHRU Tours, Service d'hématologie [Angers], CHU Angers, Service d'Hématologie clinique et thérapie cellulaire [CHU Limoges], CHU Limoges, Semiconductor Photonics Research Group, Trinity College Dublin-Science Foundation Ireland-Enterprise Ireland-Higher Education Authority, Service d'hématologie, Centre Hospitalier Régional Universitaire [Besançon] ( CHRU Besançon ) -hopital Jean Minjoz, Institut de Cancérologie de la Loire Lucien Neuwirth, Centre Hospitalier Universitaire de Saint-Etienne ( CHU de Saint-Etienne ), Service d'hématologie [Hôpital Edouard Herriot - HCL], Hôpital Edouard Herriot [CHU - HCL], Hospices Civils de Lyon ( HCL ) -Hospices Civils de Lyon ( HCL ), and Centre Hospitalier Régional Universitaire [Lille] ( CHRU Lille )
Subjects: Oncology, Male, Adult, Homologous, medicine.medical_specialty, Transplantation Conditioning, Cyclophosphamide, Graft vs Host Disease, Cord Blood Stem Cell Transplantation, Haploidentical, Disease-Free Survival, 03 medical and health sciences, 0302 clinical medicine, HLA Antigens, Internal medicine, hemic and lymphatic diseases, medicine, Transplantation, Homologous, Humans, Retrospective Studies, Transplantation, [ SDV ] Life Sciences [q-bio], business.industry, Hazard ratio, Hematology, medicine.disease, Hodgkin Disease, Histocompatibility, surgical procedures, operative, Graft-versus-host disease, 030220 oncology & carcinogenesis, Cord blood, Immunology, Transplantation, Haploidentical, Female, business, Unrelated Donors, 030215 immunology, medicine.drug, Follow-Up Studies, Stem Cell Transplantation
Abstract: International audience; Allogeneic stem cell transplantation (allo-SCT) following a non-myeloablative (NMA) or reduced-intensity conditioning (RIC) is considered a valid approach to treat patients with refractory/relapsed Hodgkin lymphoma (HL). When an HLA-matched donor is lacking a graft from a familial haploidentical (HAPLO) donor, a mismatched unrelated donor (MMUD) or cord blood (CB) might be considered. In this retrospective study, we compared the outcome of patients with HL undergoing a RIC or NMA allo-SCT from HAPLO, MMUD or CB. Ninety-eight patients were included. Median follow-up was 31 months for the whole cohort. All patients in the HAPLO group (N=34) received a T-cell replete allo-SCT after a NMA (FLU-CY-TBI, N=31, 91%) or a RIC (N=3, 9%) followed by post-transplant cyclophosphamide. After adjustment for significant covariates, MMUD and CB were associated with significantly lower GvHD-free relapse-free survival (GRFS; hazard ratio (HR)=2.02, P=0.03 and HR=2.43, P=0.009, respectively) compared with HAPLO donors. In conclusion, higher GRFS was observed in Hodgkin lymphoma patients receiving a RIC or NMA allo-SCT with post-transplant cyclophosphamide from HAPLO donors. Our findings suggest they should be favoured over MMUD and CB in this setting.
Published: 2017
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54. Intramyocardial transplantation of mesenchymal stromal cells for chronic myocardial ischemia and impaired left ventricular function: Results of the MESAMI 1 pilot trial

Author: Daniel Cussac, Gilles Lande, Nicolas Piriou, Joffrey Pozzo, Matthieu Berry, J.B. Ruidavet, Angelo Parini, Philippe Bourin, T. Le Tourneau, M. Lebrin, A. Huynh, S. Kramer, Olivier Lairez, Fabian Gross, Luc Sensebé, Alain Manrique, Damien Guijarro, Jean-Noël Trochu, Patricia Lemarchand, Jerome Roncalli, Michel Galinier, Guillaume Lamirault, Meyer Elbaz, unité de recherche de l'institut du thorax UMR1087 UMR6291 (ITX), Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE), Université de Nantes (UN)-Université de Nantes (UN)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratoire de thérapie cellulaire, Etablissement Français du Sang, Laboratoire de chimie organique et organométallique (LCOO), Université Sciences et Technologies - Bordeaux 1-Centre National de la Recherche Scientifique (CNRS), Equipe 7 Inserm U1048, Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Toulouse III - Paul Sabatier (UT3), STROMALab, Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Vétérinaire de Toulouse (ENVT), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Etablissement Français du Sang-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratoire de Biothérapie, CHU Toulouse [Toulouse], CIC - Nantes, Université de Nantes (UN)-IFR26-Institut National de la Santé et de la Recherche Médicale (INSERM), Service de médecine nucléaire [CHU Caen], Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-CHU Caen, Normandie Université (NU)-Tumorothèque de Caen Basse-Normandie (TCBN)-Tumorothèque de Caen Basse-Normandie (TCBN), Epidémiologie et analyses en santé publique : risques, maladies chroniques et handicaps (LEASP), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées, Service de cardiologie [Toulouse], Hôpital de Rangueil, CHU Toulouse [Toulouse]-CHU Toulouse [Toulouse], Laboratoire national des champs magnétiques intenses - Grenoble (LNCMI-G ), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE), Université de Nantes (UN)-Université de Nantes (UN), CHU Caen, Normandie Université (NU)-Tumorothèque de Caen Basse-Normandie (TCBN)-Normandie Université (NU)-Tumorothèque de Caen Basse-Normandie (TCBN)-Université de Caen Normandie (UNICAEN), Normandie Université (NU), Institut du thorax, Institut National de la Santé et de la Recherche Médicale (INSERM)-Etablissement Français du Sang-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Ecole Nationale Vétérinaire de Toulouse (ENVT), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Semiconductor Photonics Research Group, Trinity College Dublin-Science Foundation Ireland-Enterprise Ireland-Higher Education Authority, Biosense Webster, Inc., Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Hôpital de Rangueil, Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Etablissement Français du Sang-Centre National de la Recherche Scientifique (CNRS), Lemarchand, Patricia, Unité de recherche de l'institut du thorax (ITX-lab), Université Sciences et Technologies - Bordeaux 1 (UB)-Centre National de la Recherche Scientifique (CNRS), Module Biothérapies, Centre Hospitalier Universitaire de Toulouse (CHU Toulouse), Service Cardiologie [CHU Toulouse], Pôle Cardiovasculaire et Métabolique [CHU Toulouse], Centre Hospitalier Universitaire de Toulouse (CHU Toulouse)-Centre Hospitalier Universitaire de Toulouse (CHU Toulouse), Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire national des champs magnétiques intenses - Grenoble (LNCMI), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Grenoble Alpes (UGA)
Subjects: 0301 basic medicine, Cardiac function curve, Male, medicine.medical_specialty, Single Photon Emission Computed Tomography Computed Tomography, medicine.medical_treatment, Myocardial Ischemia, Pilot Projects, [SDV.BC]Life Sciences [q-bio]/Cellular Biology, 030204 cardiovascular system & hematology, Revascularization, Mesenchymal Stem Cell Transplantation, Transplantation, Autologous, 03 medical and health sciences, Ventricular Dysfunction, Left, 0302 clinical medicine, Internal medicine, Medicine, Humans, Prospective Studies, [SDV.BC] Life Sciences [q-bio]/Cellular Biology, ComputingMilieux_MISCELLANEOUS, Cells, Cultured, Ejection fraction, Ischemic cardiomyopathy, business.industry, Myocardium, Mesenchymal stem cell, Middle Aged, 3. Good health, Clinical trial, Transplantation, 030104 developmental biology, Treatment Outcome, Cardiology, Feasibility Studies, Female, Cardiology and Cardiovascular Medicine, business, Perfusion, Follow-Up Studies
Abstract: Background: The MESAMI 1 trial was a bicentric pilot study designed to test the feasibility and safety of intramyocardially injected autologous bone marrow-derived mesenchymal stromal cells (MSCs) for the treatment of ischemic cardiomyopathy. Methods and Results: The study included 10 patients with chronic myocardial ischemia, left ventricular (LV) ejection fractions (EFs) of ≤35%, and reversible perfusion defects who were on stable optimal medical therapy and were not candidates for revascularization. MSCs (mean: 61.5×106 cells per patient) were injected into 10-16 viable sites at the border of the LV scar via a NOGA-guided catheter. Both primary endpoints, feasibility (successful harvest, expansion, and injection of autologous MSCs) and safety (absence of severe adverse events [SAEs]) were met in all 10 patients at the 1-month follow-up time point, and none of the SAEs reported during the full 2-year follow-up period were attributable to the study intervention. The results of secondary efficacy endpoint analyses identified significant improvements from baseline to Month 12 in LVEF (29.4±2.0% versus 35.7±2.5%; p=0.003), LV end-systolic volume (167.8±18.8 mL versus 156.1±28.6 mL; p=0.04), 6- minute walk test and NYHA functional class. Conclusions: Our results suggest that autologous MSCs can be safely administered to the hearts of patients with severe, chronic, reversible myocardial ischemia and impaired cardiac function and may be associated with improvements in cardiac performance, LV remodeling, and patient functional status. A randomized, double blind, multicenter, placebo-controlled clinical trial (MESAMI 2) will evaluate the efficacy of this treatment approach in a larger patient population. Clinical Trial Registration: Unique identifier: NCT01076920
Published: 2016
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55. Nonlinear Pulse Shaping in Fibres for Pulse Generation and Optical Processing

Author: Christophe Finot, Sonia Boscolo, Photonics Research Group, Aston University, Aston University [Birmingham], Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), and Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS )
Subjects: Optical fiber, Optical communication, Physics::Optics, 02 engineering and technology, 01 natural sciences, Signal, law.invention, 010309 optics, 020210 optoelectronics & photonics, Optics, law, Distortion, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, lcsh:QC350-467, Physics, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Signal processing, [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, Pulse shaping, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Supercontinuum, business, lcsh:Optics. Light, Bandwidth-limited pulse
Abstract: International audience; The development of new all-optical technologies for data processing and signal manipulation is a field of growing importance with a strong potential for numerous applications in diverse areas of modern science. Nonlinear phenomena occurring in optical fibres have many attractive features and great, but not yet fully explored potential in signal processing. Here, we review recent progress on the use of fibre nonlinearities for the generation and shaping of optical pulses and on the applications of advanced pulse shapes in all-optical signal processing. Amongst other topics, we will discuss ultrahigh repetition rate pulse sources, the generation of parabolic shaped pulses in active and passive fibres, the generation of pulses with triangular temporal profiles, and coherent super-continuum sources. The signal processing applications will span optical regeneration, linear distortion compensation, optical decision at the receiver in optical communication systems, spectral and temporal signal doubling and frequency conversion.
Published: 2012
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56. Temporal and spectral nonlinear shaping techniques in optical fibers

Author: Finot, Christophe, Millot, Guy, Fatome, Julien, Turitsyn, S.K, Boscolo, Sonia, Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Photonics Research Group, Aston University, Aston University [Birmingham], Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), and Finot, Christophe
Subjects: [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2015

57. In-Cavity Transformations for New Nonlinear Regimes of Pulse Generation in Mode-Locked Fibre Lasers

Author: Sonia Boscolo, Sergei Turitsyn, Christophe Finot, Photonics Research Group, Aston University, Aston University [Birmingham], Aston Institute of Photonic Technologies (AIPT), Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Aston Institute of Photonic Technologies ( AIPT ), Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), and Finot, Christophe
Subjects: [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics]
Abstract: International audience; We review recent progress in the research on nonlinear mechanisms of pulse generation in passively mode-locked fibre lasers. These include parabolic self-similar pulse mode-locking, a mode-locking regime featuring pulses with a triangular distribution of the intensity, and spectral compression arising from nonlinear pulse propagation. We also report on the possibility of achieving various regimes of advanced temporal waveform generation in a mode-locked fibre laser by inclusion of a spectral filter into the laser cavity.
Published: 2014

58. Temporal and spectral nonlinear pulse shaping in normally dispersive optical fibers

Author: Boscolo, Sonia, Finot, Christophe, Photonics Research Group, Aston University, Aston University [Birmingham], Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Finot, Christophe, Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), and Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics]
Abstract: The combination of the third-order optical nonlinearity with chromatic dispersion in optical fibers offers an extremely rich variety of possibilities for tailoring the temporal and spectral content of a light signal, depending on the regime of dispersion that is used. Because the nonlinear dynamics of pulses propagating in fibers with normal group-velocity dispersion is generally sensitive to the initial pulse condition, it is possible to nonlinearly shape the propagating pulses through control of the initial pulse temporal intensity and/or phase profile. Here, we review recent progress on the use of third-order nonlinear processes in normally dispersive fibers for pulse shaping in the temporal and spectral domains. Various examples of practical significance will be discussed, spanning fields from the generation of specialized temporal waveforms to the generation of stable continua with high power spectral density, and to spectral compression of the pulses.
Published: 2014

59. Nonlinear pulse shaping and polarization dynamics in mode-locked fiber lasers

Author: Sonia Boscolo, Vitaly Mikhailov, Sergey Sergeyev, Sergei K. Turitsyn, Paul S. Westbrook, Christophe Finot, Chengbo Mou, Veronika Tsatourian, Bryan Rabin, Photonics Research Group, Aston University, Aston University [Birmingham], Aston Institute of Photonic Technologies ( AIPT ), Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Aston Institute of Photonic Technologies (AIPT), Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), and Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Femtosecond pulse shaping, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, Statistical and Nonlinear Physics, Condensed Matter Physics, Polarization (waves), Pulse shaping, Nonlinear system, Optics, Fiber laser, Optoelectronics, Soliton, business, Ultrashort pulse, Bandwidth-limited pulse
Abstract: International audience; We review our recent progress on the study of new nonlinear mechanisms of pulse shaping in passively mode-locked ﬁber lasers. These include a mode-locking regime featuring pulses with a triangular distribution of the intensity, and spectral compression arising from nonlinear pulse propagation. We also report on our recent experimental studies unveiling new types of vector solitons with processing states of polarization for multi-pulse and tightly bound-state soliton (soliton molecule) operations in a carbon nanotube (CNT) mode-locked ﬁber laser with anomalous dispersion cavity.
Published: 2014
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60. Pulse shaping in mode-locked ﬁber lasers by in-cavity spectral ﬁlter

Author: Christophe Finot, Periklis Petropoulos, Huseyin Karakuzu, Sonia Boscolo, Photonics Research Group, Aston University, Aston University [Birmingham], Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Optoelectronics Research Centre, University of Southampton [Southampton], Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), and University of Southampton
Subjects: Femtosecond pulse shaping, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Materials science, [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, Physics::Optics, 02 engineering and technology, Injection seeder, 01 natural sciences, Pulse shaping, Atomic and Molecular Physics, and Optics, law.invention, 010309 optics, 020210 optoelectronics & photonics, Optics, Mode-locking, Fiber Bragg grating, law, Fiber laser, Optical cavity, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, business, Bandwidth-limited pulse
Abstract: International audience; We numerically show the possibility of pulse shaping in a passively mode-locked ﬁber laser by inclusion of a spectral ﬁlter into the laser cavity. Depending on the amplitude transfer function of the ﬁlter, we are able to achieve various regimes of advanced temporal waveform generation, including ones featuring bright and dark parabolic-, ﬂat-top-, triangular- and saw-tooth-proﬁled pulses. The results demonstrate the strong potential of an in-cavity spectral pulse shaper for controlling the dynamics of mode-locked ﬁber lasers.
Published: 2014
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61. Tailored waveform generation in mode-locked fiber lasers by in-cavity pulse shaper

Author: Christophe Finot, Sonia Boscolo, Periklis Petropoulos, Finot, Christophe, Photonics Research Group, Aston University, Aston University [Birmingham], Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Optoelectronics Research Centre, University of Southampton [Southampton], Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), and University of Southampton
Subjects: Femtosecond pulse shaping, [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Materials science, [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, Physics::Optics, 02 engineering and technology, Injection seeder, Laser, 01 natural sciences, Pulse shaping, law.invention, 010309 optics, 020210 optoelectronics & photonics, Optics, Fiber Bragg grating, Multiphoton intrapulse interference phase scan, law, Fiber laser, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, business, Bandwidth-limited pulse
Abstract: International audience; We numerically show the possibility of pulse shaping in a mode-locked ﬁber laser by inclusion of an amplitude-phase spectral ﬁlter into the laser cavity. Various advanced temporal waveforms are generated, including parabolic, ﬂat-top and triangular pulses.
Published: 2014

62. Nonlinear pulse shaping in normally dispersive fibers : experimental examples

Author: Kamal Hammani, Julien Fatome, Guy Millot, Sonia Boscolo, Hervé RIGNEAULT, Stefan Wabnitz, Christophe Finot, Finot, Christophe, Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), ICB-SLCO, Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), SLCO, Photonics Research Group, Aston University, Aston University [Birmingham], MOSAIC ( MOSAIC ), Institut FRESNEL ( FRESNEL ), Aix Marseille Université ( AMU ) -Ecole Centrale de Marseille ( ECM ) -Centre National de la Recherche Scientifique ( CNRS ) -Aix Marseille Université ( AMU ) -Ecole Centrale de Marseille ( ECM ) -Centre National de la Recherche Scientifique ( CNRS ), univesité de brescia, Department of Information Engineering, Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)-Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), MOSAIC (MOSAIC), Institut FRESNEL (FRESNEL), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), and Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)
Subjects: [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], Physics::Optics
Abstract: International audience; While the combination of Kerr nonlinearity with dispersion in optical fibers can seriously impair high speed optical transmissions, it also provides an attractive solution to generate new temporal and spectral waveforms. We explain in this talk how to take advantage of the progressive temporal and spectral reshapings that occur upon propagation in a normally dispersive fiber. We base our discussion on several experimental results obtained at telecommunication wavelengths.
Published: 2014

63. Façonnage d'impulsions optiques par filtrage intra-cavité dans un laser à fibre

Author: Boscolo , Sonia, Finot , Christophe, Petropoulos , Periklis, Finot, Christophe, Photonics Research Group, Aston University, Aston University [Birmingham], Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Optoelectronics Research Centre, University of Southampton, Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), and University of Southampton [Southampton]
Subjects: [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics]
Abstract: National audience; Nous démontrons numériquement la possibilité de façonner des impulsions optiques au sein d'une cavité laser fibrée à modes bloqués en insérant un filtre spectral programmable en intensité et phase. Différents profils temporels d'intensité sont obtenus, dont des impulsions paraboliques, triangulaires ou en dents de scie.
Published: 2014

64. Pulse transition to similaritons in normally dispersive fibre amplifiers

Author: Christophe Finot, Sonia Boscolo, Kamal Hammani, SLCO, Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)-Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Photonics Research Group, Aston University, Aston University [Birmingham], Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), and Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS )
Subjects: [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Materials science, [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], Pulse (signal processing), business.industry, Amplifier, 02 engineering and technology, 01 natural sciences, Computer Science::Digital Libraries, Atomic and Molecular Physics, and Optics, Optical fibre amplifiers, Electronic, Optical and Magnetic Materials, 010309 optics, 020210 optoelectronics & photonics, Optics, 0103 physical sciences, Dispersion (optics), 0202 electrical engineering, electronic engineering, information engineering, business
Abstract: selected by the editors of Journal of Optics as a Highlight of 2013a video linked to the experiments can be seen at : http://youtu.be/thbXaW91D5g; International audience; A detailed experimental characterization of the transition process of an initially Gaussian pulse to the asymptotic self-similar parabolic solution in optical fibre amplifiers operating in the normal dispersion regime is performed.
Published: 2013
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65. Silicon-on-insulator integrated source of polarization-entangled photons

Author: Serge Massar, Philippe Emplit, Jassem Safioui, Roel Baets, Kien Phan Huy, Stéphane Clemmen, Laurent Olislager, Wim Bogaerts, Optics, Photonics, Electromagnetism, Radio-Communications and Acoustics (OPERA), Université libre de Bruxelles (ULB), School of Applied and Engineering physics [Ithaca] (AEP Cornell), Cornell University [New York], Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Photonics Research Group, Department of Information Technology (INTEC), Universiteit Gent = Ghent University [Belgium] (UGENT)-Universiteit Gent = Ghent University [Belgium] (UGENT), and Laboratoire d'Information Quantique [Bruxelles] (LIQ)
Subjects: Photon, Technology and Engineering, FOS: Physical sciences, Silicon on insulator, WIRE WAVE-GUIDE, Quantum entanglement, 01 natural sciences, 010309 optics, Photon entanglement, Quantum mechanics, 0103 physical sciences, 010306 general physics, Physics, Quantum Physics, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], PAIRS, Quantum tomography, Polarization (waves), WAVELENGTHS, Atomic and Molecular Physics, and Optics, Wavelength, Bell's theorem, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Quantum Physics (quant-ph), GENERATION
Abstract: We report the experimental generation of polarization-entangled photons at telecommunication wavelengths using spontaneous four-wave mixing in silicon-on-insulator wire waveguides. The key component is a 2D coupler that transforms path entanglement into polarization entanglement at the output of the device. Using quantum state tomography we find that the produced state has fidelity 88% with a pure non-maximally entangled state. The produced state violates the CHSH Bell inequality by S=2.37\pm0.19., 3 pages, 3 figures
Published: 2013
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66. Ampliﬁer similariton ﬁber laser with nonlinear spectral compression

Author: Sergei K. Turitsyn, Christophe Finot, Sonia Boscolo, Photonics Research Group, Aston University, Aston University [Birmingham], Sch Engn & Appl Sci, Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), and Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Femtosecond pulse shaping, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Materials science, [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, Amplifier, Physics::Optics, 02 engineering and technology, Laser, 01 natural sciences, Atomic and Molecular Physics, and Optics, law.invention, 010309 optics, 020210 optoelectronics & photonics, Optics, law, Pulse compression, Fiber laser, 0103 physical sciences, Ultrafast laser spectroscopy, 0202 electrical engineering, electronic engineering, information engineering, Laser power scaling, business, Bandwidth-limited pulse
Abstract: International audience; We propose a new concept of a ﬁber laser architecture supporting self-similar pulse evolution in the ampliﬁer and nonlinear spectral pulse compression in the passive ﬁber. The latter process allows for transform-limited picosecond pulse generation, and improves the laser's power eﬃciency by preventing strong spectral ﬁltering from being highly dissipative. Aside from laser technology, the proposed scheme opens new possibilities for studying nonlinear dynamical processes. As an example, we demonstrate a clear period-doubling route to chaos in such nonlinear laser system.
Published: 2012
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67. Nouvelle architecture de cavité laser à fibre bénéficiant du processus de compression spectrale non-linéaire

Author: Boscolo , Sonia, Turitsyn , S.K., Finot , Christophe, Photonics Research Group, Aston University, Aston University [Birmingham], Sch Engn & Appl Sci, SLCO, Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)-Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Finot, Christophe, Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), and Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS )
Subjects: [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics]
Abstract: International audience; Nous démontrons numériquement une nouvelle architecture de laser à fibre bénéficiant du processus de compression spectrale non linéaire. Les pertes induites par le filtrage intra-cavité sont alors significativement réduites et des impulsions picosecondes en limite de Fourier peuvent être générées.
Published: 2012

68. Nonlinearly generated advanced pulse waveforms for optical signal processing

Author: Christophe Finot, Sonia Boscolo, Photonics Research Group, Aston University, Aston University [Birmingham], SLCO, Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), and Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)-Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Signal processing, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, Pulse (signal processing), Optical communication, Physics::Optics, 02 engineering and technology, 01 natural sciences, Signal, Supercontinuum, 010309 optics, 020210 optoelectronics & photonics, Optics, Distortion, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, business, Bandwidth-limited pulse, Optical communications repeater
Abstract: International audience; Nonlinear phenomena occurring in optical fibres have many attractive features and great, but not yet fully explored potential in signal processing. Here, we review recent progress on the use of fibre nonlinearities for the generation and shaping of optical pulses, and on the applications of advanced pulse waveforms in all-optical signal processing. Among other topics, we will discuss ultrahigh repetition-rate pulse sources, the generation of parabolic-shaped pulses in active and passive fibres, the generation of pulses with triangular temporal profiles, and coherent supercontinuum sources. The signal processing applications will span optical regeneration, linear distortion compensation, optical decision at the receiver in optical communication systems, spectral and temporal signal doubling, and frequency conversion.
Published: 2012
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69. Amplifier similariton fibre laser with nonlinear spectral compression

Author: Sonia Boscolo, Sergei K. Turitsyn, Christophe Finot, Photonics Research Group, Aston University, Aston University [Birmingham], Sch Engn & Appl Sci, Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), and Finot, Christophe
Subjects: Optical amplifier, Femtosecond pulse shaping, [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Materials science, [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, Amplifier, Nonlinear optics, 01 natural sciences, 7. Clean energy, Pulse shaping, 010309 optics, Optics, Fiber laser, 0103 physical sciences, Optoelectronics, 010306 general physics, business, Ultrashort pulse, Bandwidth-limited pulse
Abstract: We propose and numerically demonstrate a new concept of fibre laser architecture supporting self-similar pulse evolution in the amplifier and nonlinear pulse spectral compression in the passive fibre. The latter process is beneficial for improving the power efficiency as it prevents strong spectral filtering from being highly dissipative.
Published: 2012

70. Exploiting the localized surface plasmon modes in gold triangular nanoparticles for sensing applications

Author: Branko Kolarić, Bjorn Maes, Honghui Shen, Rodica Morarescu, Renaud A. L. Vallée, Pascal Damman, Laboratoire Interfaces and Fluides Complexes, Université de Mons (UMons), Photonics Research Group (INTEC), Universiteit Gent = Ghent University [Belgium] (UGENT), Centre de recherches Paul Pascal (CRPP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Micro- and Nanophotonic Materials Group
Subjects: Materials science, Technology and Engineering, NANOPRISMS, Nanoparticle, Physics::Optics, Near and far field, Plasmon, 02 engineering and technology, METAL NANOPARTICLES, 010402 general chemistry, 01 natural sciences, Molecular physics, Optics, Materials Chemistry, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], SPECTROSCOPY, business.industry, Surface plasmon, General Chemistry, RESONANCE, 021001 nanoscience & nanotechnology, Aspect ratio (image), Surface plasmon polariton, 0104 chemical sciences, SIZE, NANOSPHERE LITHOGRAPHY, gold triangular nanoparticles, Nanosphere lithography, 0210 nano-technology, business, Localized surface plasmon
Abstract: 6 pages; International audience; In this study we investigate and exploit, for optical sensing, the surface plasmon excitation in gold triangular nanoparticles with high aspect ratios (i.e., the ratio of the edge length of the triangles with the height) prepared by nanosphere lithography. As shown previously, the shape and size of these nanoparticles were used to tune their optical properties, monitored by far field extinction spectroscopy. Interestingly, several localized surface plasmon resonances were detected in the visible and near infrared regions and were attributed to dipole and quadrupole modes. These modes, identified from numerical simulations, ''red-shift'' as the aspect ratio of the particles increases. The plasmon modes observed for larger triangles exhibit unexpected sensitivity with a change in the refractive index. From experiments and numerical simulations, this higher sensitivity has been attributed to an increase of the local field enhancement for sharper tips. This new effect can provide important information for the design of particles as building blocks for sensing applications.
Published: 2012
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71. New fiber laser architecture with transform-limited nonlinear spectral compression

Author: Sergei K. Turitsyn, Christophe Finot, Sonia Boscolo, Finot, Christophe, Photonics Research Group, Aston University, Aston University [Birmingham], Sch Engn & Appl Sci, SLCO, Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)-Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), and Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS )
Subjects: [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Distributed feedback laser, [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], Materials science, business.industry, Physics::Optics, Polarization-maintaining optical fiber, 01 natural sciences, 7. Clean energy, Graded-index fiber, 010309 optics, Optics, Fiber Bragg grating, Fiber laser, 0103 physical sciences, Optoelectronics, Dispersion-shifted fiber, 010306 general physics, business, Plastic optical fiber, Photonic-crystal fiber
Abstract: International audience; We numerically demonstrate a new fiber laser architecture supporting spectral compression of negatively chirped pulses in passive normally dispersive fiber. Such a process is beneficial for improving the energy efficiency of the cavity as it prevents narrow spectral filtering from being highly dissipative. The proposed laser design provides an elegant way of generating transform-limited picosecond pulses.
Published: 2012

72. Nonlinear Fibre-Based Photonic Technologies

Author: Miguel González Herráez, Juan Diego Ania Castañón, Christophe Finot, Sonia Boscolo, Universidad de Alcalá. Departamento de Electrónica, Photonics Research Group, Aston University, Aston University [Birmingham], Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), and Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Engineering, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Technology, [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], Article Subject, business.industry, MathematicsofComputing_GENERAL, Atomic and Molecular Physics, and Optics, GeneralLiterature_MISCELLANEOUS, Electronic, Optical and Magnetic Materials, InformationSystems_GENERAL, lcsh:QC350-467, CIENCIAS TECNOLÓGICAS, Electrónica, TECHNOLOGY, Ciencias tecnológicas, Electronics, business, Humanities, lcsh:Optics. Light, ComputingMilieux_MISCELLANEOUS
Abstract: © 2012
Published: 2012
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73. Nonlinear spectral shaping and optical rogue events in fiber-based systems

Author: Julien Fatome, Goëry Genty, Kamal Hammani, Guy Millot, Christophe Finot, Sonia Boscolo, John M. Dudley, Bertrand Kibler, SLCO, Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Photonics Research Group, Aston University, Aston University [Birmingham], Tampere University of Technology [Tampere] ( TUT ), Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies ( FEMTO-ST ), Université de Technologie de Belfort-Montbeliard ( UTBM ) -Ecole Nationale Supérieure de Mécanique et des Microtechniques ( ENSMM ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Franche-Comté ( UFC ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)-Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Tampere University of Technology [Tampere] (TUT), Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), and Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Optical fiber, Physics::Optics, 02 engineering and technology, 01 natural sciences, Stability (probability), law.invention, 010309 optics, 020210 optoelectronics & photonics, Optics, law, 0103 physical sciences, Dispersion (optics), 0202 electrical engineering, electronic engineering, information engineering, Fiber, Electrical and Electronic Engineering, Instrumentation, Physics, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, Pulse shaping, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Supercontinuum, Nonlinear system, Control and Systems Engineering, Peregrine soliton, business
Abstract: International audience; We provide an overview of our recent work on the shaping and stability of optical continua in the long pulse regime. Fibers with normal group-velocity dispersion at all-wavelengths are shown to allow for highly coherent continua that can be nonlinearly shaped using appropriate initial conditions. In contrast, supercontinua generated in the anomalous dispersion regime are shown to exhibit large fluctuations in the temporal and spectral domains that can be controlled using a carefully chosen seed. A particular example of this is the first experimental observation of the Peregrine soliton which constitutes a prototype of optical rogue-waves.
Published: 2012
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74. Nonlinear pulse shaping in fibres for pulse generation and optical processing

Author: Boscolo , Sonia, Turitsyn , S.K., Finot , Christophe, Photonics Research Group, Aston University, Aston University [Birmingham], Sch Engn & Appl Sci, Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), and Finot, Christophe
Subjects: [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics]
Published: 2011

75. New developments in the study of optical parabolic pulses in normally dispersive fibers

Author: Kamal Hammani, Brandon G. Bale, Christophe Finot, Sonia Boscolo, Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Photonics Research Group, Aston University, Aston University [Birmingham], Finot, Christophe, Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), and Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Materials science, Raman amplification, [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, Gaussian, Nonlinear optics, Physics::Optics, 01 natural sciences, Supercontinuum, 010309 optics, symbols.namesake, Optics, 0103 physical sciences, Dispersion (optics), symbols, Stimulated emission, 010306 general physics, business, Photonic-crystal fiber, Photonic crystal
Abstract: International audience; We report two recent studies dealing with the evolution of parabolic pulses in normally dispersive fibers. On the one hand, the nonlinear reshaping from a Gaussian intensity profile towards the asymptotic parabolic shape is experimentally investigated in a Raman amplifier. On the other hand, the significant impact of the fourth order dispersion on a passive propagation is theoretically discussed: we numerically demonstrate flat-top, coherent supercontinuum generation in an all-normal dispersion-flattened photonic crystal fiber. This shape is associated to a strong reshaping of the temporal profile what becomes triangular.
Published: 2011

76. Transition dynamics in optical fiber amplifiers operating in the normal dispersion regime

Author: Kamal Hammani, Christophe Finot, Brandon G. Bale, Sonia Boscolo, Photonics Research Group, Aston University, Aston University [Birmingham], Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), and Finot, Christophe
Subjects: [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], Physics, Optical amplifier, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, 01 natural sciences, Pulse shaping, Pulse (physics), 010309 optics, Optics, Quantum electrodynamics, 0103 physical sciences, Dispersion (optics), Chirp, Initial value problem, 010306 general physics, business, Adiabatic process, Ultrashort pulse
Abstract: Over the past decade there has been large interest in ultrafast optical fiber amplifiers operating in the normal dispersion regime because of the discovery that, high-energy pulses with a parabolic intensity profile and linear frequency chirp are the asymptotic solution to the system for arbitrary initial conditions [1]. These so-called “similariton” solutions propagate in a self-similar manner, holding certain relations (scaling) between pulse power, duration, and chirp parameter. While the asymptotic similariton features seem now well understood [1], the physics of the transition to this solution from arbitrary initial pulses has not been fully explored yet (most of the previous attempts to answer this question have focused on an initial parabolic pulse [2]). In this work, we provide a theoretical and experimental description of the adiabatic transition from an arbitrary low-energy initial condition to the asymptotic similariton state.
Published: 2011

77. 100 nm period grating by high-index phase-mask immersion lithography

Author: Yannick Bourgin, Yves Jourlin, Jurgen Van Erps, Richard M. De La Rue, O. Parriaux, Petri Karvinen, Anne Talneau, Nicolas Passilly, David Troadec, Svetlen Tonchev, Ahmad Rifqi Md Zain, Colette Veillas, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Laboratoire Hubert Curien (LHC), Institut d'Optique Graduate School (IOGS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de photonique et de nanostructures (LPN), Centre National de la Recherche Scientifique (CNRS), Institut of the Solid State Physics (ISSP), Bulgarian Academy of Sciences (BAS), University of Joensuu, Department of Physics and Mathematics (JOE), University of Joensuu, Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Photonics Research Group, Centre for Communication, University of Bristol [Bristol], Dpt of Electronics & Electrical Engineering, University of Glasgow, Department of Applied Physics and Photonics [Brussels] (TONA), Vrije Universiteit Brussel (VUB), European Project: 241479,EC:FP7:HEALTH,FP7-HEALTH-2009-single-stage,NEMO(2009), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN], Laboratoire Hubert Curien [Saint Etienne] (LHC), Institut d'Optique Graduate School (IOGS)-Université Jean Monnet [Saint-Étienne] (UJM)-Centre National de la Recherche Scientifique (CNRS), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), and Applied Physics and Photonics
Subjects: Materials science, Lithography, Nanostructure fabrication, 02 engineering and technology, Grating, 01 natural sciences, law.invention, Interference lithography, 010309 optics, Optics, law, 0103 physical sciences, Blazed grating, Photography, Nanotechnology, MIRRORS, ARRAYS, Diffraction grating, Immersion lithography, ComputingMilieux_MISCELLANEOUS, Subwavelength structures, INTERFERENCE LITHOGRAPHY, FABRICATION, business.industry, Equipment Design, 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, Equipment Failure Analysis, Refractometry, Resist, Diffraction gratings, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, 0210 nano-technology, business, Next-generation lithography
Abstract: The interferogram of a high index phase mask of 200 nm period under normal incidence of a collimated beam at 244 nm wavelength with substantially suppressed zeroth order produces a 100 nm period grating in a resist film under immersion. The paper describes the phase mask design, its fabrication, the effect of electron-beam lithographic stitching errors and optical assessment of the fabricated sub-cutoff grating. (C) 2010 Optical Society of America
Published: 2010
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78. Resonance tuning of two-photon absorption microcavities for wavelength-selective pulse monitoring

Author: John F. Donegan, Weihua Guo, T. Krug, A.L. Bradley, J. O'Dowd, Liam P. Barry, H. Folliot, P.J. Maguire, Michael Lynch, Semiconductor Photonics Group, Trinity College Dublin, Ireland (SEMICOND. PHOTONICS GROUP, TRINITY COLL., DUBLIN, IRELAND), Trinity College Dublin, Semiconductor Photonics Research Group, Trinity College Dublin-Science Foundation Ireland-Enterprise Ireland-Higher Education Authority, Research Institute for Networks and Communications Engineering (RINCE), Dublin City University [Dublin] (DCU), Dublin City University [Dublin] (DCU)-Science Foundation Ireland-Enterprise Ireland-Higher Education Authority-School of Electronic Engineering, Fonctions Optiques pour les Technologies de l'informatiON (FOTON), Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne, Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, cavity resonators, Physics::Instrumentation and Detectors, Optical communication, Photodetector, Physics::Optics, 02 engineering and technology, Two-photon absorption, high-speed optical techniques microcavities monitoring nonlinear optics optical communication equipment optical tuning photodetectors two-photon processes, 020210 optoelectronics & photonics, Optics, 0202 electrical engineering, electronic engineering, information engineering, Electrical and Electronic Engineering, Absorption (electromagnetic radiation), GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), business.industry, 020208 electrical & electronic engineering, Detector, Nonlinear optics, Resonance, Cavity resonator filters, Physics::Classical Physics, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Computer Science::Other, Wavelength, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Optoelectronics, business
Abstract: PUBLISHED, We showthe potential use of a single photodetector for multichannel pulse monitoring. Two-photon absorption in a microcavity structure is used as the nonlinear optical technique for pulse monitoring. Angle tuning of the device allows the resonance to be tuned. For the device studied here that is optimized for 2-ps pulses, a possible tuning range of 55 nm is shown., SFI
Published: 2009
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79. Chromatic Dispersion Monitoring of 80-Gb/s OTDM Data Signal via Two-Photon Absorption in a Semiconductor Microcavity

Author: P.J. Maguire, Michael Lynch, H. Folliot, J. O'Dowd, A.L. Bradley, K. Bondarczuk, Weihua Guo, Liam P. Barry, John F. Donegan, Research Institute for Networks and Communications Engineering (RINCE), Dublin City University [Dublin] (DCU)-Science Foundation Ireland-Enterprise Ireland-Higher Education Authority-School of Electronic Engineering, Dublin City University [Dublin] (DCU), Semiconductor Photonics Group, Trinity College Dublin, Ireland (SEMICOND. PHOTONICS GROUP, TRINITY COLL., DUBLIN, IRELAND), Trinity College Dublin, Semiconductor Photonics Research Group, Trinity College Dublin-Science Foundation Ireland-Enterprise Ireland-Higher Education Authority, Fonctions Optiques pour les Technologies de l'informatiON (FOTON), Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne, PAI Ulysses 2004-05, Dublin CU, Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne-Centre National de la Recherche Scientifique (CNRS), and Folliot, Hervé
Subjects: Materials science, [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, Optical communication, Data signal, Physics::Optics, 02 engineering and technology, 01 natural sciences, Two-photon absorption, 010309 optics, 020210 optoelectronics & photonics, Optics, Time-division multiplexing, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Electrical and Electronic Engineering, Absorption (electromagnetic radiation), business.industry, Detector, [PHYS.COND.CM-MS] Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Semiconductor, Monitoring data, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Optoelectronics, business, Two photon absorption microcavities OTDM chromatic dispersion monitoring
Abstract: 3 pages cité dans Nature Photonics Mars 2007 Vol 1 p 151; International audience; In this letter, a novel method of chromatic dispersion monitoring via two-photon absorption (TPA) is investigated. A specially designed semiconductor microcavity is employed as a TPA detector for monitoring data signals operating at rates up to 80Gb/s. As the microcavity has a wavelength-dependent response, a single device can be used to monitor multiple channels in a multiwavelength optical telecommunication system
Published: 2007

80. Dispersion Monitoring for High-Speed WDM Networks via Two-Photon Absorption in a Semiconductor Microcavity

Author: Marciniak, Marian, Maguire, P.J., Bondarczuk, K., Barry, Liam, O'Dowd, John, Guo, W.H., Lynch, M., Bradley, L., Donegan, J.F., Folliot, Hervé, Research Institute for Networks and Communications Engineering (RINCE), Dublin City University [Dublin] (DCU)-Science Foundation Ireland-Enterprise Ireland-Higher Education Authority-School of Electronic Engineering, Semiconductor Photonics Group, Trinity College Dublin, Ireland (SEMICOND. PHOTONICS GROUP, TRINITY COLL., DUBLIN, IRELAND), Trinity College Dublin, Semiconductor Photonics Research Group, Trinity College Dublin-Science Foundation Ireland-Enterprise Ireland-Higher Education Authority, Fonctions Optiques pour les Technologies de l'informatiON (FOTON), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne-Centre National de la Recherche Scientifique (CNRS), Ulysses PAI, Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), and Université de Rennes (UNIV-RENNES)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne
Subjects: Physics, business.industry, Bandwidth (signal processing), Optical communication, Physics::Optics, 02 engineering and technology, 01 natural sciences, Two-photon absorption, 010309 optics, Wavelength, 020210 optoelectronics & photonics, Optics, microcavity, Wavelength-division multiplexing, 0103 physical sciences, Dispersion (optics), [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, 0202 electrical engineering, electronic engineering, information engineering, Optoelectronics, two-photon absorption, Optical filter, business, wavelength division multiplexing, dispersion monitoring, Photonic crystal
Abstract: International audience; Due to the continued demand for bandwidth, network operators have to increase the data rates at which individual wavelengths operate at. As these data rates will exceed 100 Gbit/s in the next 5 – 10 years, it will be crucial to be able to monitor and compensate for the amount of chromatic dispersion encountered by individual wavelength channels. This paper will focus on the use of the novel nonlinear optical-to-electrical conversion process of Two-Photon Absorption (TPA) for dispersion monitoring. By incorporating a specially designed semiconductor microcavity, the TPA response becomes wavelength dependent, thus allowing simultaneous channel selection and monitoring without the need for external wavelength filtering.
Published: 2006
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81. All-optical sampling based on TPA in semiconductor microcavity for high-speed OTDM

Author: Maguire, Paul, Barry, Liam, Krug, T., Lynch, M., Bradley, A.L., Donegan, J.F., Folliot, Hervé, Research Institute for Networks and Communications Engineering (RINCE), Dublin City University [Dublin] (DCU)-Science Foundation Ireland-Enterprise Ireland-Higher Education Authority-School of Electronic Engineering, Semiconductor Photonics Research Group, Trinity College Dublin-Science Foundation Ireland-Enterprise Ireland-Higher Education Authority, Fonctions Optiques pour les Technologies de l'informatiON (FOTON), Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne, SPIE, Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Physics::Optics
Abstract: conference 5825A "Optoelectronics and Photonics Devices", poster session [5825-44], proceedings of SPIE (ISBN 0-8194-5810-4); International audience; Future high-speed optical communications networks operating at data rates in excess of 100Gbit/s per channel will require a sensitive and ultrafast technique for precise optical signal monitoring. The standard way of characterising high-speed optical signals to use a fast photodetector in conjunction with a high-speed oscilloscope. However, this method is limited to a maximum data rate of approximately 40Gbit/s. An alternative is to employ all-optical sampling techniques based on ultrafast optical nonlinearities present in optical fibres, optical crystals and semiconductors. One such nonlinearity is the optical-to-electrical process of Two-Photon Absorption (TPA) in a semiconductor. This paper presents an optical sampling technique based on TPA in a specially designed semiconductor microcavity. By incorporating the microcavity design, we are able to enhance the TPA efficiency to a level that can be used for high-speed optical sampling.
Published: 2005
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82. All-Optical Sampling Utilising Two-Photon Absorption in a Semiconductor Micro-Cavity

Author: T. Krug, John F. Donegan, Liam P. Barry, A.L. Bradley, Hervé Folliot, P.J. Maguire, Michael D. Lynch, Research Institute for Networks and Communications Engineering (RINCE), Dublin City University [Dublin] (DCU)-Science Foundation Ireland-Enterprise Ireland-Higher Education Authority-School of Electronic Engineering, Semiconductor Photonics Research Group, Trinity College Dublin-Science Foundation Ireland-Enterprise Ireland-Higher Education Authority, Fonctions Optiques pour les Technologies de l'informatiON (FOTON), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), and Université de Rennes (UNIV-RENNES)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne
Subjects: Physics, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, Optical communication, Physics::Optics, Sampling (statistics), 02 engineering and technology, 01 natural sciences, Two-photon absorption, 010309 optics, All optical, 020210 optoelectronics & photonics, Optics, Semiconductor, Temporal resolution, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Optoelectronics, Electrical and Electronic Engineering, business, Absorption (electromagnetic radiation), Sensitivity (electronics)
Abstract: International audience; A highly-efficient optical sampling system based on two-photon absorption in a semiconductor microcavity is presented. The sensitivity of the sampling system is calculated to be 0.1 mW/sup 2/ with a temporal resolution of 2 ps.
Published: 2005
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83. High-sensitivity two-photon absorption microcavity autocorrelator

Author: A.L. Bradley, John F. Donegan, T. Krug, G. Hill, Hervé Folliot, J.S. Roberts, Liam P. Barry, Michael Lynch, Semiconductor Photonics Group (SEMICONDUCTOR PHOTONICS GROUP), Trinity College Dublin, Semiconductor Photonics Group, Trinity College Dublin, Ireland (SEMICOND. PHOTONICS GROUP, TRINITY COLL., DUBLIN, IRELAND), Semiconductor Photonics Research Group, Trinity College Dublin-Science Foundation Ireland-Enterprise Ireland-Higher Education Authority, Fonctions Optiques pour les Technologies de l'informatiON (FOTON), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne-Centre National de la Recherche Scientifique (CNRS), National Centre for III-V Technologies (EPSRC), University of Sheffield [Sheffield], Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), and Université de Rennes (UNIV-RENNES)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne
Subjects: Materials science, Autocorrelator, Photodetector, Physics::Optics, III-V semiconductors aluminium compounds gallium arsenide high-speed optical techniques micro-optics microcavities optical communication equipment optical correlation photodetectors two-photon processes, 02 engineering and technology, 01 natural sciences, Two-photon absorption, law.invention, 010309 optics, Optics, law, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Optical communication, Electrical and Electronic Engineering, Optoelectronics, Absorption (electromagnetic radiation), Cavities, correlation, nonlinear detection, optical pulse measurements, photodetectors, photodiodes, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), autocorrelator, Photocurrent, business.industry, Condensed Matter::Other, Photoconductivity, 020208 electrical & electronic engineering, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Photodiode, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, business, Sensitivity (electronics)
Abstract: PUBLISHED, A GaAs-AlAs microcavity device has been used as a photodetector in an autocorrelator for measuring the temporal pulsewidth of 1.5-/spl mu/m optical pulses. Enhancement of the two-photon absorption photocurrent due to the microcavity structure results in an autocorrelation (average power times peak power) sensitivity of 9.3/spl times/10/sup -4/ (mW)/sup 2/, which represents two orders of magnitude improvement when compared with conventional autocorrelators
Published: 2004
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84. Effects of fourth-order fiber dispersion on ultrashort parabolic optical pulses in the normal dispersion regime

Author: Christophe Finot, Brandon G. Bale, Sonia Boscolo, Kamal Hammani, Photonics Research Group, Aston University, Aston University [Birmingham], Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), and Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Femtosecond pulse shaping, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], Materials science, business.industry, Physics::Optics, Statistical and Nonlinear Physics, 02 engineering and technology, 01 natural sciences, Atomic and Molecular Physics, and Optics, Supercontinuum, 010309 optics, 020210 optoelectronics & photonics, Optics, Multiphoton intrapulse interference phase scan, 0103 physical sciences, Dispersion (optics), 0202 electrical engineering, electronic engineering, information engineering, Dispersion-shifted fiber, business, Ultrashort pulse, Bandwidth-limited pulse, Photonic-crystal fiber
Abstract: International audience; We propose a new method for the generation of both triangular-shaped optical pulses and flat-top, coherent supercontinuum spectra using the effect of fourth-order dispersion on parabolic pulses in a passive, normally dispersive highly nonlinear fiber. The pulse re-shaping process is described qualitatively and is compared to numerical simulations.
Published: 2011
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85. Highly-efficient optical sampling based on two-photon absorption in a semiconductor micro-cavity device

Author: M.L. Lynch, T. Krug, John F. Donegan, Hervé Folliot, P.J. Maguire, Liam P. Barry, A.L. Bradley, Research Institute for Networks and Communications Engineering (RINCE), Dublin City University [Dublin] (DCU)-Science Foundation Ireland-Enterprise Ireland-Higher Education Authority-School of Electronic Engineering, Semiconductor Photonics Research Group, Trinity College Dublin-Science Foundation Ireland-Enterprise Ireland-Higher Education Authority, Fonctions Optiques pour les Technologies de l'informatiON (FOTON), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne-Centre National de la Recherche Scientifique (CNRS), OSA, Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne, and Fève, Sylvain
Subjects: [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Materials science, business.industry, 020208 electrical & electronic engineering, Optical communication, Nonlinear optics, 02 engineering and technology, Semiconductor device, Two-photon absorption, Photon counting, 020210 optoelectronics & photonics, Optics, Semiconductor, Temporal resolution, 0202 electrical engineering, electronic engineering, information engineering, Optoelectronics, Absorption (electromagnetic radiation), business
Abstract: CLEO subject 8 "Ultrafast Optics, Optoelectronics and applications", technical session “Ultrafast Measurement Techniques” [CTuAA5]; International audience; We demonstrate a highly-efficient optical sampling system based upon the nonlinear process of Two-Photon Absorption in a specially designed semiconductor micro-cavity. The sensitivity of the system is around 0.1mW2 and the temporal resolution is 2ps.

86. Integrated Optics Waveguides and Mesoporous Oxides for the Monitoring of Volatile Organic Compound Traces in the Mid-Infrared.

Author: Frank F, Baumgartner B, Verstuyft M, Teigell Beneitez N, Missinne J, Van Thourhout D, Roelkens G, and Lendl B
Abstract: Volatile organic compounds (VOCs) are an ever-growing hazard for health and environment due to their increased emissions and accumulation in the air. Quantum cascade laser-based infrared (QCL-IR) sensors hold significant promise for gas monitoring, thanks to their compact, rugged design, high laser intensity, and high molecule-specific detection capabilities within the mid-infrared spectrum's fingerprint region. In this work, tunable external cavity QCLs were complemented by an innovative germanium-on-silicon integrated optics waveguide sensing platform with integrated microlenses for efficient backside optical interfacing for the tunable laser spectrometer. The waveguide chip was coated with a mesoporous silica coating, thereby increasing the signal by adsorptive enhancement of VOCs while at the same time limiting water vapor interferences. Different least square fitting methods were explored to deconvolute the resulting spectra, showing subparts-per-million by volume (sub-ppmv) limits of detection and enrichment factors of up to 22 000 while keeping the footprint of the setup small (29 × 23 × 11 cm³). Finally, a use-case simulation for the continuous detection of VOCs in a process analytical technology environment confirmed the high potential of the technique for the monitoring of contaminants. By successfully demonstrating the use of photonic waveguides for the monitoring of VOCs, this work offers a promising avenue for the further development of fully integrated sensors on a chip., Competing Interests: Declaration of Conflicting InterestsThe author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
Published: 2024
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87. Optically Pumped and Electrically Switchable Microlaser Array Based on Elliptic Deformation and Q-Attenuation of Organic Droplet Oscillators.

Author: Kato M, Miyagawa J, Noguchi SI, Takada N, Baba S, Someya S, Singh AK, Huang JS, Yamamoto Y, and Yamagishi H
Abstract: Conventional laser panel displays are developed through the mass integration of electrically pumped lasers or through the incorporation of a beam steering system with an array of optically pumped lasers. Here a novel configuration of a laser panel display consisting of a non-steered pumping beam and an array of electrically Q-switchable lasers is reported. The laser oscillator consists of a robust, self-standing, and deformable minute droplet that emits laser through Whispering-Gallery Mode resonance when optically pumped. The laser oscillation is electrically switchable during optical pumping by applying a vertical electric field to the droplet. Electromagnetic and fluid dynamics simulations reveal the deformation of the droplet into a prolate spheroid under the electric field and associated attenuation of quality factor (Q-factor), leading to the halt of the laser oscillation. A 2 × 3 array of droplets is fabricated by inkjet printing as a prototype of a laser panel display, and it successfully achieves the pixel-selective switching of the oscillation., (© 2024 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.)
Published: 2024
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88. Characterization of octenyl succinylated potato-starch based films enriched with extracts from various honey-bee products.

Author: Pająk P, Socha R, Królikowska K, Grzyb J, Hetmańczyk J, and Zachariasz P
Abstract: The study developed octenyl succinylated (OS) potato starch complexes with ethanolic extracts of honey bee products (HBE) and assess their effects on starch-based films properties. X-ray diffraction and thermogravimetric analysis showed that OS starch films had lower crystallinity and higher thermal stability than native ones. Adding HBE enhanced V-type ordering in OS films. Starch esterification raised the water contact angle (WCA) from 52.9° to 62.3°, with hydrophobicity improvements when HBE was added (WCA >78.9°). OS starch-HBE complexes increased the antioxidant properties compared to non-modified starch films, in the order: propolis > bee bread > bee pollen > buckwheat honey > multiflower honey. The sum of individual phenolic compounds (IPC) in OS starch films was significantly higher compared to native counterparts, showing increases of 35 %, 83 % and 20 % for films with bee pollen, bee bread, and propolis, respectively. The latter film exhibited the highest IPC, totaling 2204.4 mg/100 g. While OS starch did not affect the antimicrobial properties of the films, the incorporation of HBE significantly improved their ability to bacterial inhibition, with propolis showing the strongest effect. Despite reduced optical and sensory properties of OS films, OS starch complexes with bee bread and propolis show great potential for food packaging., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024. Published by Elsevier B.V.)
Published: 2024
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89. Phase-Change-Material-Based True Time-Delay System.

Author: Kutteeri R, De Carlo M, De Leonardis F, Soref RA, and Passaro VMN
Abstract: This study explores the achievement of a tunable true time-delay (TTD) system for a microwave phased-array antenna (MPAA) by incorporating the reversible phase-transition property of phase-change material (PCM) with Bragg gratings (BGs) and a cascade of three phase-shifted Bragg grating resonators (CPSBGRs). The goal was to design a low-power-consuming, non-volatile highly tunable compact TTD system for beam steering. A programmable on/off reflector was designed by changing a PCM-incorporated BG/CPSBGR from one phase to another. By arranging several programmable on/off reflectors in a row, a delay line was realized, and by incorporating several delay lines, the TTD system was achieved. Numerical simulations and parametric analyses were conducted for the evaluation of the TTD system's performance at an operating wavelength of 1550 nm and 1550.6 nm for programmable on/off reflectors with BGs and CPSBGRs. The findings point out the effectiveness of incorporating PCMs with BGs/CPSBGRs, thereby maintaining a high performance with less complexity.
Published: 2024
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90. Respiratory Rate Monitoring via a Fibre Bragg Grating-Embedded Respirator Mask with a Wearable Miniature Interrogator.

Author: Limweshasin N, Castro IA, Korposh S, Morgan SP, Hayes-Gill BR, Faghy MA, and Correia R
Subjects: Humans, Male, Adult, Monitoring, Physiologic instrumentation, Monitoring, Physiologic methods, Female, Masks, Healthy Volunteers, Algorithms, Equipment Design, Respiratory Rate physiology, Wearable Electronic Devices, Optical Fibers
Abstract: A respiration rate (RR) monitoring system was created by integrating a Fibre Bragg Grating (FBG) optical fibre sensor into a respirator mask. The system exploits the sensitivity of an FBG to temperature to identify an individual's RR by measuring airflow temperature variation near the nostrils and mouth. To monitor the FBG response, a portable, battery-powered, wireless miniature interrogator system was developed to replace a relatively bulky benchtop interrogator used in previous studies. A healthy volunteer study was conducted to evaluate the performance of the developed system (10 healthy volunteers). Volunteers were asked to perform normal breathing whilst simultaneously wearing the system and a reference spirometer for 120 s. Individual breaths are then identified using a peak detection algorithm. The result showed that the number of breaths detected by both devices matched exactly (100%) across all volunteer trials.
Published: 2024
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91. Emergent Self-Adaptation in an Integrated Photonic Neural Network for Backpropagation-Free Learning.

Author: Lugnan A, Aggarwal S, Brückerhoff-Plückelmann F, Wright CD, Pernice WHP, Bhaskaran H, and Bienstman P
Abstract: Plastic self-adaptation, nonlinear recurrent dynamics and multi-scale memory are desired features in hardware implementations of neural networks, because they enable them to learn, adapt, and process information similarly to the way biological brains do. In this work, these properties occurring in arrays of photonic neurons are experimentally demonstrated. Importantly, this is realized autonomously in an emergent fashion, without the need for an external controller setting weights and without explicit feedback of a global reward signal. Using a hierarchy of such arrays coupled to a backpropagation-free training algorithm based on simple logistic regression, a performance of 98.2% is achieved on the MNIST task, a popular benchmark task looking at classification of written digits. The plastic nodes consist of silicon photonics microring resonators covered by a patch of phase-change material that implements nonvolatile memory. The system is compact, robust, and straightforward to scale up through the use of multiple wavelengths. Moreover, it constitutes a unique platform to test and efficiently implement biologically plausible learning schemes at a high processing speed., (© 2024 The Author(s). Advanced Science published by Wiley‐VCH GmbH.)
Published: 2024
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92. Author Correction: Emerging opportunities and challenges for the future of reservoir computing.

Author: Yan M, Huang C, Bienstman P, Tino P, Lin W, and Sun J
Published: 2024
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93. Photoacoustic Resonators for Non-Invasive Blood Glucose Detection Through Photoacoustic Spectroscopy: A Systematic Review.

Author: Kaysir MR, Zaman TM, Rassel S, Wang J, and Ban D
Subjects: Humans, Blood Glucose Self-Monitoring instrumentation, Blood Glucose Self-Monitoring methods, Diabetes Mellitus diagnosis, Diabetes Mellitus blood, Spectrum Analysis methods, Blood Glucose analysis, Photoacoustic Techniques instrumentation, Photoacoustic Techniques methods
Abstract: Diabetes mellitus is a prevalent disease with a rapidly increasing incidence projected worldwide, affecting both industrialized and developing regions. Effective diabetes management requires precise therapeutic strategies, primarily through self-monitoring of blood glucose levels to achieve tight glycemic control, thereby mitigating the risk of severe complications. In recent years, there have been significant advancements in non-invasive techniques for measuring blood glucose using photoacoustic spectroscopy (PAS), as it shows great promise for the detection of glucose using the infrared region (e.g., MIR and NIR) of light. A critical aspect of this method is the detection of the photoacoustic signal generated from blood glucose, which needs to be amplified through a photoacoustic resonator (PAR). In this work, an overview of various types of PARs used for non-invasive glucose sensing is reviewed, highlighting their operating principle, design requirements, limitations, and potential improvements needed to enhance the analysis of photoacoustic signals. The motivation behind this review is to identify and discuss main parameters crucial to the efficient design of PARs used in non-invasive glucose detection, which will be helpful for furthering the basic understanding of this technology and achieving the highly sensitive PAR required for non-invasive glucose monitoring.
Published: 2024
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94. i-PHAOS: An Overview with an Open-Source Collaborative Database on Miniaturized Integrated Spectrometers.

Author: Coppola CM, De Carlo M, De Leonardis F, and Passaro VMN
Abstract: On-chip spectrometers are increasingly becoming tools that might help in everyday life needs. The possibility offered by several available integration technologies and materials to be used to miniaturize spectrometers has led to a plethora of very different devices, that in principle can be compared according to their metrics. Having access to a reference database can help in selecting the best-performing on-chip spectrometers and being up to date in terms of standards and developments. In this paper, an overview of the most relevant publications available in the literature on miniaturized spectrometers is reported and a database is provided as an open-source project to which researchers can have access and participate in order to improve the share of knowledge in the interested scientific community.
Published: 2024
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95. Comparing peripheral limb and forehead vital sign monitoring in newborn infants at birth.

Author: Swamy SKN, Stockwell SJ, Liu C, Henry C, Shipley L, Ward C, Mirahmadi S, Correia R, Morgan SP, Crowe JA, Sharkey D, and Hayes-Gill BR
Abstract: Background: To study the feasibility of measuring heart rate (HR) and oxygen saturation (SpO 2 ) on the forehead, during newborn transition at birth, and to compare these measurements with those obtained from the wrist., Methods: Vital signs were measured and compared between forehead-mounted reflectance (remittance) photoplethysmography sensor (fhPPG) and a wrist-mounted pulse oximeter sensor (wrPO), from 20 enrolled term newborns born via elective caesarean section, during the first 10 min of life., Results: From the datasets available (n = 13), the median (IQR) sensor placement times for fhPPG, ECG and wrPO were 129 (70) s, 143 (68) s, and 159 (76) s, respectively, with data recorded for up to 10 min after birth. The success rate (percentage of total possible HR values reported once sited) of fhPPG (median = 100%) was higher compared to wrPO (median = 69%) during the first 6 min of life (P < 0.005). Both devices exhibited good HR agreement with ECG, achieving >95% agreement by 3 (fhPPG) and 4 (wrPO) min. SpO 2 for fhPPG correlated with wrPO (r = 0.88), but there were significant differences in SpO 2 between the two devices between 3 and 8 min (P < 0.005), with less variance observed with fhPPG SpO 2 ., Conclusion: In the period of newborn transition at birth in healthy term infants, forehead measurement of vital signs was feasible and exhibited greater HR accuracy and higher estimated SpO 2 values compared to wrist-sited pulse oximetry. Further investigation of forehead monitoring based on the potential benefits over peripheral monitoring is warranted., Impact: This study demonstrates the feasibility of continuously monitoring heart rate and oxygen saturation from an infant's forehead in the delivery room immediately after birth. Significantly higher SpO 2 measurements were observed from the forehead than the wrist during the transition from foetal to newborn life. Continuous monitoring of vital signs from the forehead could become a valuable tool to improve the delivery of optimal care provided for newborns at birth., (© 2024. The Author(s).)
Published: 2024
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96. Non-contact photoacoustic imaging with a silicon photonics-based Laser Doppler Vibrometer.

Author: Dieussaert E, Baets R, Jans H, Rottenberg X, and Li Y
Abstract: Photoacoustic imaging has emerged as a powerful, non-invasive modality for various biomedical applications. Conventional photoacoustic systems require contact-based ultrasound detection and expensive, bulky high-power lasers for the excitation. The use of contact-based detectors involves the risk of contamination, which is undesirable for most biomedical applications. While other non-contact detection methods can be bulky, in this paper, we demonstrate a proof-of-concept experiment for compact and contactless detection of photoacoustic signals on silicone samples embedded with ink-filled channels. A silicon photonics-based Laser Doppler Vibrometer (LDV) detects the acoustic waves excited by a compact pulsed laser diode. By scanning the LDV beam over the surface of the sample, 2D photoacoustic images were reconstructed of the sample., (© 2024. The Author(s).)
Published: 2024
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97. Geometric characteristics of stromal collagen fibres in breast cancer using differential interference contrast microscopy.

Author: Ghannam SF, Rutland CS, Allegrucci C, Mather ML, Alsaleem M, Bateman-Price TD, Patke R, Ball G, Mongan NP, and Rakha E
Abstract: Breast cancer (BC) is characterised by a high level of heterogeneity, which is influenced by the interaction of neoplastic cells with the tumour microenvironment. The diagnostic and prognostic role of the tumour stroma in BC remains to be defined. Differential interference contrast (DIC) microscopy is a label-free imaging technique well suited to visualise weak optical phase objects such as cells and tissue. This study aims to compare stromal collagen fibre characteristics between in situ and invasive breast tumours using DIC microscopy and investigate the prognostic value of collagen parameters in BC. A tissue microarray was generated from 200 cases, comprising ductal carcinoma in situ (DCIS; n = 100) and invasive tumours (n = 100) with an extra 50 (25 invasive BC and 25 DCIS) cases for validation was utilised. Two sections per case were used: one stained with haematoxylin and eosin (H&E) stain for histological review and one unstained for examination using DIC microscopy. Collagen fibre parameters including orientation angle, fibre alignment, fibre density, fibre width, fibre length and fibre straightness were measured. Collagen fibre density was higher in the stroma of invasive BC (161.68 ± 11.2 fibre/µm 2 ) compared to DCIS (p < 0.0001). The collagen fibres were thinner (13.78 ± 1.08 µm), straighter (0.96 ± 0.006, on a scale of 0-1), more disorganised (95.07° ± 11.39°) and less aligned (0.20 ± 0.09, on a 0-1 scale) in the invasive BC compared to DCIS (all p < 0.0001). A model considering these features was developed that could distinguish between DCIS and invasive tumours with 94% accuracy. There were strong correlations between fibre characteristics and clinicopathological parameters in both groups. A statistically significant association between fibre characteristics and patients' outcomes (breast cancer specific survival, and recurrence free survival) was observed in the invasive group but not in DCIS. Although invasive BC and DCIS were both associated with stromal reaction, the structural features of collagen fibres were significantly different in the two disease stages. Analysis of the stroma fibre characteristics in the preoperative core biopsy specimen may help to differentiate pure DCIS from those associated with invasion., (© 2024 The Author(s). Journal of Microscopy published by John Wiley & Sons Ltd on behalf of Royal Microscopical Society.)
Published: 2024
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98. Influence of furcellaran and safflower oil concentration on the properties of model emulgel systems.

Author: Stępień A, Juszczak L, Synkiewicz-Musialska B, Zachariasz P, and Jamróz E
Subjects: Hydrogen-Ion Concentration, Temperature, Carthamus tinctorius chemistry, Safflower Oil chemistry, Gels chemistry
Abstract: The aim of this study was to investigate the effect of varying concentrations of furcellaran (FUR) and safflower (Carthamus Tinctorius) oil on the functional properties of emulgels as potential carriers of bioactive substances. The textural, mechanical, thermal and structural properties of twenty different formulations were characterised. The pH stability and zeta-potential of the emulgels was also examined. It was found clear correlation between gelling agent and oil fraction content and investigated properties. The hardness, strength, thermal stability expressed as melting point of the investigated systems increased with increasing concentration of the furcellaran and decreasing proportion of safflower oil, which indicated a significant weakening of the structure as a result of the addition of the oil fraction. Stored under refrigeration, emulgels appeared to be relatively stable showing a slight decrease in pH values after 7 days. Swelling ratio (SW) of emulgels increased with increasing both, polysaccharide and oil content, in emulgels. Based on the microstructure analyses, it can also be concluded that only part of the added safflower oil chemically bound to the functional groups of the polysaccharide, while the vast majority of it was only physically immobilized in the furcellaran matrix. Colour of furcellaran - safflower oil emulsion gels depended largely on the amount of oil fraction. The presented research demonstrating the wide spectrum of functional properties of polysaccharide-oil systems is a first step to developing a carrier composition for lipophilic compounds at further stages of research., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. The author is not an Editorial Board Member/Editor-in-Chief/Associate Editor/Guest Editor for International Journal of Biological Macromolecules and was not involved in the editorial review or the decision to publish this article., (Copyright © 2024 The Author(s). Published by Elsevier B.V. All rights reserved.)
Published: 2024
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99. Stimulated Emission and Lasing from Bulk CdSe Nanocrystals.

Author: Cayan SA, Samoli M, Tanghe I, Lin CY, Respekta D, Hodgkiss JM, Chen K, Hens Z, and Geiregat P
Abstract: Nanocrystals with a size in the regime of vanishing quantum confinement, or bulk nanocrystals (BNCs), have emerged recently as viable solution processable optical gain materials in the green part of the spectrum. Here, we show that these properties can be extended to the crucial red region using CdSe BNCs. Through quantitative time-resolved spectroscopy, we can model these nanocrystals as bulk semiconductors, thereby revealing that the gain originates from an unbound electron-hole plasma state. The gain is broadband in nature and is not capped by Auger processes, but by a slower second-order recombination resulting in nanosecond gain lifetimes. Finally, optically pumped lasers under femtosecond pulsed and quasi-continuous wave operation are demonstrated using a photonic crystal surface emitting laser cavity, thereby stretching from 635 to 720 nm. Our results indicate that compositional variation can indeed provide spectral versatility to the BNC concept, while preserving the excellent gain metrics associated with it.
Published: 2024
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100. Graphene metamaterial (GMM) based dual mode, tunable, and broadband THz absorber with triple circular split ring structure.

Author: Preety NH and Mohsin ASM
Abstract: In this study we investigated a novel approach to designing a graphene metamaterial (GMM) based terahertz (THz) absorber with dual-mode functionality, tunability, and broadband absorption capabilities. The study leverages the unique properties of graphene, a material known for its exceptional electronic and optical characteristics, combined with metamaterials to achieve efficient THz absorption. Here we performed extensive simulation on four different types of configurations and found the optimized structure has the highest bandwidth of 3.8 THz and absorption over 90 %. The absorber is designed to operate in two distinct modes, enhancing its versatility for different applications in the THz spectrum. Moreover, the tunability of the absorber is a significant feature, allowing for dynamic adjustment of the absorption frequency, which is crucial for applications in THz imaging, sensing, and communication systems. The broadband nature of the absorber ensures effective performance over a wide range of frequencies, addressing the need for flexible and high-performance devices in emerging THz technologies. This work represents a significant advancement in the field of THz metamaterials, with potential implications for the development of next-generation THz devices., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2024 The Authors.)
Published: 2024
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