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Your search keyword '"Adrian Mihaescu"' showing total 3 results
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3 results on '"Adrian Mihaescu"'

1. Realizing optical amplifiers with micro-sphere: A 15 dB gain, 2 dB noise-figure, tiny amplifier

Author

Patrice Feron, Olivier Bouchet, Adrian Mihaescu, Pascal Besnard, N. Traynor, Achille Monteville, 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), Orange Labs [Lannion], France Télécom, Plate-Forme d'Etudes et de Recherche sur les Fibres Optiques Spéciales (PERFOS), association PERFOS, 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, Optical amplifier, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, Amplifier, Bandwidth (signal processing), Optical communication, 02 engineering and technology, Noise figure, 01 natural sciences, 010309 optics, 020210 optoelectronics & photonics, Optics, Q factor, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Optoelectronics, Stimulated emission, business, Lasing threshold
Abstract

We propose recently in a pan to use these objects as optical amplifiers. This aim requires working in a complete different direction. Firstly it is not suitable to have a good quality factor for the micro-sphere, because we want to avoid the lasing effect and the interferences between the many round-trip fields that will give a severe limitation to the optical bandwidth. Secondly, it could be interesting to have bigger sphere in order to have a higher gain. We present in this communication the fabrication of optical amplifiers [3] using 6000 ppm Er3+ Al-doped silica micro-spheres of diameters ranging from 200 mum to 3 mm. In a first step, 46 samples have been made in order to realize this study.

Published
2007
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2. Multiwavelength fiber laser with an intracavity polarizer

Author

Thierry Chartier, Adrian Mihaescu, Gilles Martel, François Sanchez, Ammar Hideur, 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, Complexe de recherche interprofessionnel en aérothermochimie (CORIA), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Propriétés Optiques des Matériaux et Applications (POMA), Centre National de la Recherche Scientifique (CNRS)-Université d'Angers (UA), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), 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 Université d'Angers (UA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Optical fiber, Materials science, Physics::Optics, 02 engineering and technology, 01 natural sciences, law.invention, 010309 optics, Fiber lasers, 020210 optoelectronics & photonics, Optics, law, Fiber laser, Polarization, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Electrical and Electronic Engineering, Physical and Theoretical Chemistry, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Birefringence, business.industry, Polarizer, Polarization (waves), Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Wavelength, business, PACS : 42.55.Wd, 42.81.Gs
Abstract

topic « Lasers and laser applications »; International audience; We present the experiment that allows multiwavelength operation and tunability of a neodymium-doped fiber laser with an intracavity polarizer. Then, we present the experimental method to extract the Jones matrix of the fiber as a function of the wavelength. Hence, using the round-trip operator method, we compare both experimental and theoretical wavelength selection and find a excellent agreement.

Published
2005
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3. Oscillating Bubbles at the Tips of Optical Fibers in Liquid Nitrogen

Author

Kevin F. MacDonald, S. Pochon, Celine Guignard, Nikolay I. Zheludev, Adrian Mihaescu, Pascal Besnard, Vassili A. Fedotov, B.F. Soares, School of Physics and Astronomy [Southampton], University of Southampton, Laboratoire d'Optronique, and Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Optical fiber, Materials science, business.industry, Bubble, Optical measurements, Physics::Optics, Radius, Liquid nitrogen, law.invention, Pulse (physics), Microsecond, Optics, law, PACS: 47.55.Dz, business
Abstract

International audience; We report that a bubble with a radius of a few micrometers may be created at a precise location on a metal-coated optical fiber tip immersed in liquid nitrogen by microsecond optical pulses with peak powers of less than 20 mW. Dynamic optical measurements reveal that after termination of the optical pulse the bubble exhibits stable oscillations for several tens of microseconds, at frequencies up to several megahertz, as it slowly collapses.

Published
2003
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