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Luc Thévenaz

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Publications associées (373)

Polarization Dependent Pulse Distortion in Stimulated Brillouin Scattering Slow Light Systems

Luc Thévenaz, Sang Hoon Chin

Optical Society of America2009

Physical limits to broadening compensation in a linear slow light system

Luc Thévenaz

The dispersion experienced by a signal in a slow light system leads to a significant pulse broadening and sets a limit to the maximum delay actually achievable by the system. To overcome this limitation, a substantial research effort is currently being car ...

2009

Polarization Evolution of Stimulated Brillouin Scattering Amplified Signals in Standard Fibers

Luc Thévenaz

The polarization evolution of stimulated Brillouin scattering amplified signals in the presence of fiber birefringence is examined in analysis, simulation and experiment. The signal polarization is drawn towards the conjugate of the pump polarization. ...

Optical Society of America2009

Optical sampling technique applied to high resolution distributed fibre sensors

Luc Thévenaz, Stella Foaleng Mafang

A technique developed to acquire fast optical signals using low frequency detection and acquisition is presented here. It is based on optical sampling that creates a replica of the fast signal on a much slower time scale by a simple strobe effect. High ban ...

SPIE2009

Material Slow Light Does Not Enhance Beer-Lambert Absorption

Luc Thévenaz, Stella Foaleng Mafang, Sang Hoon Chin, Isabelle Dicaire

Optical Society of America2009

Brillouin Distributed Fibre Sensing: State of the Art and Perspectives

Luc Thévenaz

Developed societies require more and more information for their safety and for their economic development. Recent disasters due to landslides, fires in tunnels and collapses of bridges are a source of serious concern on the part of the public which seeks f ...

Materials Research Society of Singapore2009

Vector analysis of stimulated Brillouin scattering amplification in standard single-mode fibers

Luc Thévenaz

The polarization properties of stimulated Brillouin scattering (SBS) amplification or attenuation in standard single-mode fibers are examined through vectorial analysis, simulation and experiment. Vector propagation equations for the signal wave, incorpora ...

2008

All-Optical Polarization Control through Brillouin Amplification

Luc Thévenaz

Amplification through stimulated Brillouin scattering in optical fibers can totally modify the polarization properties of the light, enabling an all-optical polarization control and a direct estimate on the fiber birefringence. ...

Optical Society of America2008

Slow and fast light in optical fibres

Luc Thévenaz

The ubiquitous role of optical fibres in modern photonic systems has stimulated research to realize slow and fast light devices directly in this close-to-perfect transmission line. Recent progress in developing optically controlled delays in optical fibres ...

Nature Publishing Group2008

Molecular relaxation effects in hydrogen chloride photoacoustic detection

Luc Thévenaz, Jean-Philippe Besson

A photoacoustic (PA) sensor has been developed to monitor hydrogen chloride at sub-ppm level in the 1740-nm region. The system was designed to control the process in the novel low-water-peak optical fiber manufacturing process. Relaxation effects in hydrog ...

Springer Verlag2008

Laser offset-frequency locking up to 20 GHz using a low-frequency electrical filter technique

Luc Thévenaz

Optical Society of America2008

A High-Performance Optical Time-Domain Brillouin Distributed Fiber Sensor

Luc Thévenaz

2008

Seepage and settlement monitoring for earth embankment dams using fully distributed sensing along optical fibers

Luc Thévenaz, Pingyu Zhu, Yao Zhou

A method for seepage and settlement monitoring in earth embankment dams using fully distributed sensing along optical fibres is proposed. A model is developed for simulating and monitoring seepage and settlement systems. This model relates the strains and ...

SPIE2008

Self-advanced fast light propagation in an optical fiber based on Brillouin scattering

Luc Thévenaz, Sang Hoon Chin

We experimentally demonstrate an extremely simple technique to achieve pulse advancements in optical fibers by using both spontaneous amplified and stimulated Brillouin scattering. It is shown that the group velocity of a light signal is all-optically cont ...

2008

Oxygen detection using a differential Helmholtz-based photoacoustic sensor operating in the 760 nm range

Luc Thévenaz, Mario Mattiello, Marcel Gyger

Connecticut College, New London, Connecticut USA2007

Design of simulator for seepage detection in an embankment based on distributed optic fibre sensing technology

Luc Thévenaz, Pingyu Zhu, Yang Zhou

Based on the temperature change in an embankment, a seepage flow simulator and monitoring system based on distributed optical fiber sensing are proposed. A simulator is designed that consists of scale model of embankment with definite length, seepage flow ...

2007

Molecular relaxation effects on hydrogen chloride photoacoustic detection

Luc Thévenaz, Jean-Philippe Besson

Connecticut College, New London, Connecticut USA2007

Distributed Measurement of Brillouin gain spectrum in photonic crystal fibre

Luc Thévenaz, Stella Foaleng Mafang

National Physical Laboratory (NPL)2007

Simple scheme for realizing fast light with low distortion in optical fibers

Luc Thévenaz, Sang Hoon Chin

In a previous paper (Song et al., 2005) we reported the first experimental demonstration of pulse advancement with gain in optical fibers using stimulated Brillouin scattering (SBS). We tested the two methods described above to achieve gain-assisted fast l ...

IEEE2007

Complete experimental characterization of stimulated Brillouin scattering in photonic crystal fiber

Luc Thévenaz, Dario Alasia, Stella Foaleng Mafang

We provide a complete experimental characterization of stimulated Brillouin scattering in a 160 m long solid-core photonic crystal fiber, including threshold and spectrum measurements as well as positionresolved mapping of the Brillouin frequency shift. In ...

Optical Society of America2007

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