A5000974603- Optical Network Technologies
- Semiconductor Lasers and Optical Devices
- Advanced Photonic Communication Systems
- Adhesion, Friction, and Surface Interactions
- Photonic and Optical Devices
- Adaptive optics and wavefront sensing
- Astronomy and Astrophysical Research
- Advanced Optical Network Technologies
- Solid State Laser Technologies
- Brake Systems and Friction Analysis
- Semiconductor Quantum Structures and Devices
- Photonic Crystal and Fiber Optics
- Glass properties and applications
- Metal and Thin Film Mechanics
- Powder Metallurgy Techniques and Materials
- Material Properties and Applications
- Tribology and Wear Analysis
- Iron and Steelmaking Processes
- Advanced Fiber Optic Sensors
- Tribology and Lubrication Engineering
- Lubricants and Their Additives
- Advanced Sensor Technologies Research
- Stellar, planetary, and galactic studies
- Advanced materials and composites
- Force Microscopy Techniques and Applications
Centre de Recherche Astrophysique de Lyon
2024
Centre National de la Recherche Scientifique
2009-2022
Université Claude Bernard Lyon 1
2018-2022
École Centrale de Lyon
2009-2021
Laboratoire de Tribologie et Dynamique des Systèmes
2009-2021
École Nationale d'Ingénieurs de Saint-Étienne
2018-2021
École Nationale des Travaux Publics de l'État
2018-2021
Orange (France)
1993-1996
Centre Hospitalier Lannion Trestel
1984-1995
Significance We investigate the origin of static friction, threshold force at which a frictional interface starts to slide. For rough contacts involving rubber or human skin, we show that real contact area, friction is proportional, significantly decreases under increasing shear, well before onset sliding. those soft materials, our results will impact how use and interpret current mechanics models.
With the ever growing interest in wavelength division multiplexing transmission systems, need for an optical amplifier with a large bandwidth is more and necessary. Unlike standard erbium-doped silica fiber amplifiers, fluoride-based amplifiers display uniform gain spectra. The benefit expected from fluoride multiwavelength signals has been experimentally assessed through comparisons single- cascaded-amplifiers configurations. Four db flatness was achieved four wavelength-multiplexed...
Six-axes force/torque sensors are increasingly needed in mechanical engineering. Here, we introduce a flexure-based design for such sensors, which solves some of the drawbacks existing designs. In particular, it is backlash-free, can be wirelessly monitored, exactly enforces 90 degrees angles between axes, and enables visual inspection monitored system thanks to its hollow structure. We first describe generic design, implementation calibration procedure. then demonstrate capabilities through...
HARMONI is the adaptive optics assisted, near-infrared and visible light integral field spectrograph for Extremely Large Telescope (ELT). A first instrument, it provides work-horse spectroscopic capability ELT. As project approaches its Final Design Review milestone, design of instrument being finalized, plans assembly, integration testing are detailed. We present an overview instrument's capabilities from a user perspective, provide summary design, including operations calibrations, brief...
HARMONI is the first light, adaptive optics assisted, integral field spectrograph for European Southern Observatory's Extremely Large Telescope (ELT). A work-horse instrument, it provides ELT's diffraction limited spectroscopic capability across near-infrared wavelength range. will exploit unique combination of exquisite spatial resolution and enormous collecting area, enabling transformational science. The design instrument being finalized, plans assembly, integration testing are detailed....
This paper presents the development of a new software in order to manage objects, robots and mannequins using possibilities given by haptic feedback Phantom desktop devices. The device provides 6 positional degrees freedom sensing but three force feedback. called eM-Virtual Desktop is integrated Tecnomatix's solution eM-Workplace. eM-Workplace powerful solutions for planning designing complex assembly facilities, lines workplaces. In digital mockup context, interfaces can be used reduce...
A 30 dB optical net gain and 12 dBm maximum output power for −1 signal input have been measured at a wavelength of 1.54 μm with an erbium doped ZBLAN fibre pumped 1.47–1.48 μm. The results confirm the great potential fibres hosting rare earth ions to generate amplification. discussion points out parameters be studied improve amplifier performance.
A new type of optical fibre amplifier, a 'hybrid amplifier', especially developed for multiwavelength long distance transmission systems in the 1.55 µm window is presented. 38 dB small signal gain, an +18 dBm saturation output power, very flat gain spectrum and high signal-to-noise-ratio are obtained.
An optical gain of 35 dB at 2.716 μm signal wavelength has been measured in an erbium doped ZBLAN fibre. A pump-wavelength scanning determined the pump for maximum gain. This was found to be 0.642 μm. The absorption this Er3+ fibre is 0.649 It deduced that excited state process improves performance such fibres considered.
Interest behavior of the flattened dynamic gain an erbium-doped fluorozirconate fiber amplifier is demonstrated in a lightwave CATV system including 50-channel subcarrier multiplexer. Using two analog distributed-feedback (DFB) laser diodes, one with relatively high chirp and other very low chirp, comparison between amplifiers made silica fluoride demonstrates significant influence FM response when spectral not constant.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML"...
An optical gain of 18.3 dB at a signal wavelength 2.707 μm is obtained in an Er3+ doped fluorozirconate fibre pumped 0.647 μm. The saturation power the amplifier estimated to be around 2 mW.
In polymer protection pieces, polycarbonate is often used for its transparency and high impact resistance. However, when dew appears it degrades light transmission thus transparency. To solve this problem, anti-fogging surfaces are developed.To further understand the formation in natural environment order to design efficiency on polycarbonate, a recently designed tracking setup giving pictures digital imaging procedure allowing reliable highly accurate droplet measurements were developed....
Gain spectrum and signal/noise ratio excursion assessment for a new type of fibre amplifier called ‘hybrid amplifier’ has been performed through circulating loop experiment. A wide four-wavelength multiplex transmitted up to 10 amplifiers with little degradation in the channel power difference ratio. This allows transmission at several gigabits per second be performed.
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text D. Ronarc'h, B. Clesca, Y. Sorel, Bayart, M. Guibert, L. Hamon, J. F. Kerdiles, Beylat, and Semenkoff, "1.55 μm erbium doped fluoride fiber amplifiers cascade high broadband gain flatness for multiwavelength transmission systems," in Optical Amplifiers Their Applications, Vol. 14 of 1993 OSA Technical Digest Series (Optica Publishing Group, 1993), paper PD10. Export...