Search

Your search keyword '"F. X. Esnault"' showing total 14 results
Start Over Author "F. X. Esnault"
14 results on '"F. X. Esnault"'

1. Modeling of 1/f Phase noise on ultra-stable quartz crystal resonators using Mittag-Leffler distribution

Author

F. X. Esnault, A. Pokharel, Michel Devel, G. Cibiel, J. Imbaud, Fabrice Sthal, 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 Centre National d'Études Spatiales [Toulouse] (CNES)

Subjects
Physics, [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [SPI.OTHER]Engineering Sciences [physics]/Other, Infrasound, 01 natural sciences, Noise (electronics), Power law, Computational physics, Power (physics), law.invention, [SPI.MAT]Engineering Sciences [physics]/Materials, Crystal, Resonator, law, Intermittency, 0103 physical sciences, Phase noise, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, 010306 general physics
Abstract

International audience; In order to progress towards a better understanding of the physical origin of low frequency noise in 5 MHz SC-cut quartz resonators, we have begun using the procedure proposed by Niemann et al. in a recent paper in Physical Review Letter, to check the presence of a power law intermittency process as the source of 1/f noise in our resonators. In the present paper, repeated measurements of the power spectral densities of frequency fluctuations, on a pair of resonator, are used to obtain preliminary results on the adequation of a Mittag-Leffler distribution to describe the variations of our results.

Published
2019

2. Phase noise measurements of surface acoustic wave resonators at 2.4 GHz

Author

Fabrice Sthal, F. X. Esnault, G. Cibiel, E. Vaillant, and J. Imbaud

Subjects
Physics, Noise measurement, System of measurement, Acoustics, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Power (physics), Resonator, Noise generator, 0103 physical sciences, Phase noise, 0210 nano-technology, 010301 acoustics, Noise (radio), Coupling coefficient of resonators
Abstract

In this paper, a passive measurement system is used to explore the phase noise of surface acoustic wave resonators. This method is based on the carrier suppression technique. The resonant frequency is around 2.4 GHz and the power dissipated through the resonators around 500 μW. The 1/f noise is measured and the Allan standard deviation s y_floor of an oscillator containing the test resonator is estimated.

Published
2017
Full Text
View/download PDF

3. Phase Noise Measurements of High Overtone Bulk Acoustic Wave Resonators

Author

G. Combe, E. Vaillant, F. X. Esnault, Fabrice Sthal, Thomas Baron, Valérie Pétrini, J-M. Lesage, G. Cibiel, Gilles Martin, J. Imbaud, 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 Centre National d'Études Spatiales [Toulouse] (CNES)

Subjects
Physics, [SPI.OTHER]Engineering Sciences [physics]/Other, Acoustics, Flicker, Overtone, 01 natural sciences, Resonator, Noise generator, 0103 physical sciences, Phase noise, Flicker noise, 010301 acoustics, Temperature coefficient, Noise (radio)
Abstract

International audience; In this paper, a passive measurement system is used to explore the phase noise of high overtone bulk acoustic wave resonators. The chosen overtone is around 373 MHz and the temperature coefficient of frequency at room temperature is 4 ppm/K. The 1/f noise is clearly shown and a flicker floor of about σy_floor = 1.5×10-11 is demonstrated.

Published
2016

4. Phase Noise Measurements of AlN Contour-Mode Resonators

Author

F. X. Esnault, Jeronimo Segovia-Fernandez, Fabrice Sthal, Valérie Pétrini, Gianluca Piazza, E. Vaillant, J. Imbaud, Lilia Arapan, Philippe Abbe, G. Cibiel, 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), Centre National d'Études Spatiales [Toulouse] (CNES), and Michigan State University (Department of Electrical and Computer Engineering)

Subjects
[SPI.OTHER]Engineering Sciences [physics]/Other, Materials science, Noise measurement, Acoustics, dBc, Y-factor, 01 natural sciences, Noise floor, Resonator, Noise generator, 0103 physical sciences, Phase noise, Electronic engineering, Flicker noise, 010301 acoustics
Abstract

International audience; In this paper, passive measurement system is used to explore the phase noise of aluminum nitride contour mode resonators. Their resonant frequencies are around 220 MHz. The carrier suppression technique is used. The noise floor of the measurement system is around -135 dBc/Hz @ 1 Hz offset from the carrier. Then, measurements of several resonators are presented and discussed.

Published
2016

5. Cancellation of Doppler shifts in a cold-atom CPT clock

Author

John Kitching, Elizabeth A. Donley, F. X. Esnault, and Eric M. Blanshan

Subjects
Physics, education.field_of_study, business.industry, Population, Trapping, Atomic clock, symbols.namesake, Optics, Radiation pressure, Volume (thermodynamics), Ultracold atom, symbols, business, education, Doppler effect
Abstract

A compact cold-atom clock based on coherent population trapping (CPT) is being developed. Long-term goals for the clock include achieving a fractional frequency accuracy of 1×10-13 in a package of less than 10 cm3 in volume. Here we present an overview of a prototype clock design, and a systematic evaluation of the first-order Doppler shift. We also introduce our second-generation physics package.

Published
2013
Full Text
View/download PDF

6. Dick effect and cavity pulling on HORACE compact cold atom clock

Author

David Holleville, M. Lours, F. X. Esnault, J. Delporte, N. Dimarcq, and N. Rossetto

Subjects
Physics, Frequency synthesizer, business.industry, Quantum noise, Shot noise, Noise (electronics), Atomic clock, Optics, Quantum mechanics, Laser cooling, Physics::Atomic Physics, business, Microwave, Microwave cavity
Abstract

HORACE is a compact cold caesium (Cs) atom clock using isotropic light cooling technique directly inside the spherical microwave cavity. It has been designed for onboard and space applications. Ultimate stability as low as 2.2 10−13 τ−1/2 had been demonstrated, limited by atomic shot noise and quantum projection noise. Influence of Dick effect has been studied and a compact and simple frequency synthesizer using off the shelf quartz has been realized and characterized. As atoms remain in the cavity during Ramsey sequence, long term stability evaluation focused on cavity pulling effect. This proceeding presents both the microwave synthesizer development and cavity pulling study using a tricky technique to tune the microwave cavity.

Published
2011
Full Text
View/download PDF

7. Status of a compact cold-atom CPT frequency standard

Author

F. X. Esnault, Eugene Ivanov, John Kitching, and Elizabeth A. Donley

Subjects
Condensed Matter::Quantum Gases, Physics, education.field_of_study, business.industry, High Energy Physics::Phenomenology, Population, Frequency standard, Atomic clock, Physics::Popular Physics, Optics, Ultracold atom, Laser cooling, Atom optics, High Energy Physics::Experiment, Physics::Atomic Physics, Atomic physics, education, business, Adaptive optics, Realization (systems)
Abstract

We describe the progress towards the realization of a cold-atom frequency standard based on coherent population trapping (CPT). We explain our particular CPT configuration and give details on the experimental setup.

Published
2011
Full Text
View/download PDF

8. Offset phase locking of noisy diode lasers aided by frequency division

Author

Elizabeth A. Donley, F. X. Esnault, Eugene Ivanov, School of Physics, University of Western Australia, National Institute of Standards and Technology (NIST), Systèmes de Référence Temps Espace (SYRTE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Références micro-ondes et échelles de temps, Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Frequency synthesizer, Phase-locked loop, Frequency divider, Physics, Frequency multiplier, Bandwidth (signal processing), Electronic engineering, Phase synchronization, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Instrumentation, Linear phase, Loop gain
Abstract

International audience; For heterodyne phase locking, frequency division of the beat note between two oscillators can improve the reliability of the phase lock and the quality of the phase synchronization. Frequency division can also reduce the size, weight, power, and cost of the instrument by excluding the microwave synthesizer from the control loop when the heterodyne offset frequency is large (5 to 10 GHz). We have experimentally tested the use of a frequency divider in an optical phase-lock loop and compared the achieved level of residual phase fluctuations between two diode lasers with that achieved without the use of a frequency divider. The two methods achieve comparable phase stability provided that sufficient loop gain is maintained after frequency division to preserve the required bandwidth. We have also numerically analyzed the noise properties and internal dynamics of phase-locked loops subjected to a high level of phase fluctuations, and our modeling confirms the expected benefits of having an in-loop frequency divider.

Published
2011
Full Text
View/download PDF

9. Reaching a Few 10$^{-13}$ {$\tau$}$^{-1/2}$ Stability Level with a Compact Cold Atom Clock

Author

J. Delporte, David Holleville, N. Dimarcq, Sean Perrin, F. X. Esnault, Stéphane Guérandel, Systèmes de Référence Temps Espace (SYRTE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Références micro-ondes et échelles de temps, Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), and Centre National d'Études Spatiales [Toulouse] (CNES)

Subjects
Physics, Ultracold atom, Quantum mechanics, Atomic physics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Stability (probability)
Abstract

International audience

Published
2008
Full Text
View/download PDF

10. A compact optical bench for laser cooling

Author

Stéphane Guérandel, Sean Perrin, J. Delporte, F. X. Esnault, N. Dimarcq, V. Ligeret, David Holleville, Systèmes de Référence Temps Espace (SYRTE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Références micro-ondes et échelles de temps, Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Thales Research and Technologies [Orsay] (TRT), THALES [France], and Centre National d'Études Spatiales [Toulouse] (CNES)

Subjects
Distributed feedback laser, Materials science, Optical isolator, Laser diode, business.industry, Physics::Optics, Optical polarization, law.invention, Semiconductor laser theory, Optics, law, Optical cavity, Laser cooling, Atom optics, Physics::Accelerator Physics, Optoelectronics, Physics::Atomic Physics, business, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

We present the architecture of a A4 size optical bench developed for the compact cold atom clock HORACE. This proceeding focuses on two original sub systems as compact extended cavity laser diode with optical isolator places inside the laser cavity, and very compact saturated absorption systems.

Published
2008
Full Text
View/download PDF

11. Reaching a few 10−13 τ−1/2 stability level with the compact cold atom clock HORACE

Author

David Holleville, N. Dimarcq, Sean Perrin, Stéphane Guérandel, J. Delporte, F. X. Esnault, Systèmes de Référence Temps Espace (SYRTE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Références micro-ondes et échelles de temps, Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), and Centre National d'Études Spatiales [Toulouse] (CNES)

Subjects
Physics, business.industry, Stability (probability), Noise (electronics), Atomic clock, Term (time), Optics, Ultracold atom, Laser cooling, Physics::Atomic Physics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], business, Microwave, Microwave cavity
Abstract

HORACE is a compact cold cesium atom clock which is being developed in LNE-SYRTE for space applications and onboard systems. The operation of this clock is different from fountains since the laser cooling, the microwave interrogation and the detection are sequentially performed inside the spherical microwave cavity. The entire simplified operation sequence is described. A short term relative frequency stability of 2.2 10-13 tau-1/2 is achieved. Preliminary results on mid term show that a level of 4 10-15 is reached after 5 103s of integration. Limitations are investigated.

Published
2008
Full Text
View/download PDF

12. Stability of the compact cold atom clock HORACE

Author

F. X. Esnault, J. Delporte, Sean Perrin, S. Tremine, Stéphane Guérandel, N. Dimarcq, V. Hermann, David Holleville, Systèmes de Référence Temps Espace (SYRTE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Références micro-ondes et échelles de temps, Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Thales Electron Devices (TED), THALES [France], and Centre National d'Études Spatiales [Toulouse] (CNES)

Subjects
Physics, Optics, business.industry, Ultracold atom, Laser cooling, Short term stability, Physics::Atomic Physics, business, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Stability (probability), Atomic clock, Microwave, Microwave cavity
Abstract

HORACE is a compact cold cesium atom clock which is being developed in LNE-SYRTE for space applications and onboard systems. The operation of this clock is different from fountains since the laser cooling, the microwave interrogation and the detection are sequentially performed inside the spherical microwave cavity. We recently achieved short term stability of 5.5 10-13 tau-0.5 reaching the 10-14 level at 3000 sec. We report in this paper recent developments and improvements, particularly on the cooling sequence. We also study the main limitations.

Published
2007
Full Text
View/download PDF

13. A new design of ECLD for compact atomic clocks

Author

David Holleville, V. Ligeret, N. Dimarcq, Stéphane Guérandel, F. X. Esnault, Sean Perrin, Systèmes de Référence Temps Espace (SYRTE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Références micro-ondes et échelles de temps, Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Thales Research and Technologies [Orsay] (TRT), and THALES [France]

Subjects
Physics, External cavity laser, Distributed feedback laser, Optics, business.industry, Ultracold atom, Laser cooling, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], business, Line width, Atomic clock, Semiconductor laser theory, Diode
Abstract

Cold atom clocks would take great benefits of microgravity environment. In Relation with the clock developments, we work on miniature laser-cooling optical benches. In this article we describe a new design of compact external cavity laser diode, which exhibits up to 80 mW at the output of the ECLD for a diode current of 100 mA and a line width of about 150 kHz.

Published
2007
Full Text
View/download PDF

14. Fonctionnement d'une horloge compacte à atomes froids

Author

Stéphane Guérandel, N. Dimarcq, David Holleville, S. Tremine, F. X. Esnault, Systèmes de Référence Temps Espace (SYRTE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Références micro-ondes et échelles de temps, Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)

Subjects
General Physics and Astronomy, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

HORACE est une horloge compacte a atomes froids ou les processus de refroidissement ont lieu dans la cavite d'interrogation micro-onde. Des temperatures sub-Doppler de 2 μK ont ete obtenues pour un nuage contenant environ 10 8 atomes. Nous presentons ici le mode et la sequence operatoire ainsi que les franges de Ramsey observees.

Published
2006
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results