Luc Thévenaz

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Publications associées (373)

Long optically controlled delays in optical fibers

Luc Thévenaz, Kwang-Yong Song

Optically controlled delay lines in optical fibers are demonstrated by use of the group-velocity control of signal pulses based on stimulated Brillouin scattering. We achieve continuous time delay within the range of 150 ns, much larger than the width of t ...

Optical Society of America2005

Novel Helmholtz-based photoacoustic sensor for trace gas detection at ppm level using GaInAsSb/GaAlAsSb DFB lasers

Luc Thévenaz, Mario Mattiello

Connecticut College, New London, Connecticut USA2005

Fibre Distributed Sensing for a More Secure Society

Luc Thévenaz

Brillouin time-domain analysis in optical fibres is a novel technique making possible a distributed measurement of temperature and strain over long distance and will deeply modify our view about monitoring large structures, such as dams, bridges, tunnels a ...

Nanjing University2005

Light controlling light in an optical fibre: from very slow to faster-than-light speed

Luc Thévenaz, Kwang-Yong Song

We demonstrate a method to achieve an extremely wide and flexible external control of the group velocity of signals as they propagate along an optical fibre. This control is achieved by means of the gain and loss mechanisms of stimulated Brillouin scatteri ...

Faculté Polytechnique de Mons2005

Sub-ppm multi-gas photoacoustic sensor

Luc Thévenaz, Jean-Philippe Besson

Connecticut College, New London, Connecticut USA2005

A reconstruction technique for long-range stimulated Brillouin scattering distributed fibre-optic sensors: Experimental results

Fabien Briffod, Luc Thévenaz

The experimental validation of a numerical technique for temperature/strain profile reconstruction based on Brillouin optical-fibre time-domain analysis (BOTDA) sensors is presented. In this approach, we search directly for the Brillouin frequency shift pr ...

Institute of Physics2005

Wide Control of the Group Velocity of Light in Optical Fibers

Luc Thévenaz, Kwang-Yong Song

We demonstrate experimentally that a wide control of the group velocity of light can be achieved in conventional optical fibers by use of the stimulated Brillouin scattering effect. ...

OSA2005

Mapping of chromatic-dispersion distribution along optical fibers with 20-m spatial resolution

Luc Thévenaz, Kwang-Yong Song

The accurate mapping of chromatic-dispersion distribution along single-mode optical fibers with the best spatial resolution ever reported is experimentally demonstrated. The method consists of a new way of probing four-wave-mixing (FWM) efficiency along th ...

IEEE Institute of Electrical and Electronics Engineers2005

Slow, superluminal and negative group velocity in optical fibres using stimulated Brillouin scattering

Luc Thévenaz

Active control of the group velocity in optical fibres is demonstrated, allowing long delays, faster-than-light propagation and even negative velocity, for which the peak of a pulse exits the fibre before entering the input end ...

IET2005

Optically controlled slow and fast light in optical fibers using stimulated Brillouin scattering

Luc Thévenaz, Kwang-Yong Song

We demonstrate a method to achieve an extremely wide and flexible external control of the group velocity of signals as they propagate along an optical fiber. This control is achieved by means of the gain and loss mechanisms of stimulated Brillouin scatteri ...

AIP American Institute of Physics2005

Negative Group Velocity of Light in Optical Fibers

Luc Thévenaz, Kwang-Yong Song

We demonstrate experimentally that negative group velocities of light can be achieved in conventional optical fibers by use of the stimulated Brillouin scattering effect. Velocities as slow as 71000 km/s can also be achieved. ...

OSA2005

3-D integrable optoelectronic devices for telecommunications ICs

Michel Declercq, Philippe Robert, Luc Thévenaz, Philippe Renaud, Philippe Flückiger, Mihai Adrian Ionescu, Georges-André Racine, Cyrille Hibert

The design, fabrication and characterization of CMOS-compatible optoelectronic devices is discussed. All devices are fabricated on silicon on insulator (SOI) substrates which makes them suitable for three-dimensional (3-D) telecommunication photonic integr ...

2002

A novel CMOS SOI unbalanced Mach-Zehnder interferometer: from design and simulations to fabrication and characterization

Michel Declercq, Philippe Robert, Luc Thévenaz, Philippe Renaud, Philippe Flückiger, Mihai Adrian Ionescu, Georges-André Racine, Cyrille Hibert

This paper reports on a novel, simple yet reliable, unbalanced SOI Mach-Zehnder (M-Z) interferometer architecture based on 1.2 μm CMOS process and adapted post-processing for the waveguide sidewalls. The fabricated electro-optical device is based on multip ...

2001

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