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Luc Thévenaz

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Related publications (373)

Recent progress towards centimetric spatial resolution in distributed fibre sensing

Luc Thévenaz, Stella Foaleng Mafang, Kwang-Yong Song, Sang Hoon Chin, Nikolay Primerov

Optical fibre sensors based on stimulated Brillouin scattering have now clearly demonstrated their excellent capability for long-range distributed strain and temperature measurements. The fibre is used as sensing element and a value for temperature and/or ...

The International Society for Optical Engineering2010

Distributed strain and temperature sensing over 50 km of SMF with 1 m spatial resolution employing BOTDA and optical pulse coding

Luc Thévenaz, Marcelo Alfonso Soto Hernandez

In this paper we demonstrate a long-range distributed strain and temperature optical fiber sensor using Brillouin optical time-domain analysis in conjunction with optical pulse coding. Compared to standard BOTDA, pulse coding provides higher signal-to-nois ...

SPIE2009

Potentialities of slow and fast light in optical fibers

Luc Thévenaz, Sang Hoon Chin

The ubiquitous role of optical fibers 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 fibers ...

SPIE2009

Wideband delays generated in an all-optical tunable delay line, preserving signal wavelength and bandwidth

Luc Thévenaz, Sang Hoon Chin

A novel technique to produce large all-optically controlled tunable delays of 100 ps pulse train in optical fibers is demonstrated. The configuration of the delay line basically consists of two main stages: the wavelength conversion via semiconductor optic ...

Elsevier2009

Complete compensation of pulse broadening in an amplifier-based slow light system using a nonlinear regeneration element

Luc Thévenaz, Sang Hoon Chin

We experimentally demonstrate complete compensation of pulse broadening in an amplifier-based slow light system. The configuration of the delay line basically consists of two stages: a conventional Brillouin slow light system and a nonlinear regeneration e ...

2009

Complete Broadening Compensation in a Slow Light System Using a Non-Linear Regeneration Element

Luc Thévenaz, Sang Hoon Chin

Optical Society of America2009

Enhanced long-range distributed strain and temperature sensing using BOTDA and optical pulse coding

Luc Thévenaz

Optical pulse coding is successfully applied to long-range sensors based on Brillouin optical time domain analysis, achieving a record of 1 meter spatial resolution over 50 km of SMF with 2.2°C / 44microstrain temperature/strain resolutions. ...

VDE2009

Polarization Properties of Stimulated Brillouin Scattering and Their Implications on Slow and Fast Light

Luc Thévenaz

Optical Society of America2009

Experimental verification of the effect of slow light on molecular absorption

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

The absorption of light by a gas molecule has been measured comparatively using light propagating in normal conditions and in a slow light regime. The experiment is designed to make the 2 measurements possible without modifying the interaction conditions, ...

SPIE2009

Fiber Beat Length Estimates via Polarization Measurements of Stimulated Brillouin Scattering Amplified Signals

Luc Thévenaz

Optical Society of America2009

Suspended-core fibres as optical gas sensing cells: study and implementation

Luc Thévenaz, Isabelle Dicaire

We have thoroughly studied and modelled many important aspects for the realization of gas-light interactions in suspended-core fibres. The fraction of the optical field propagating in holes could be calculated from the fibre geometry to predict the total a ...

SPIE2009

Slow and Fast Light in Optical Fibers: Review and Perspectives

Luc Thévenaz

Fiber slow light systems are at a turning point moving from a laboratory research to real applications. The possibility to shape the spectral resonance in Brillouin slow light leads to optimized configurations and innovative solutions. ...

Optical Society of America2009

Study of a progressive failure in soil using BEDS

Luc Thévenaz, Stella Foaleng Mafang

In Geotechnical Engineering, progressive failure in soil-structure interaction is one of the least understood problems. It is difficult to study this phenomenon at laboratory scale, because of the large amount of strain gages required per unit length/area ...

SPIE2009

Time-domain distributed sensor with 1 cm spatial resolution based on Brillouin dynamic gratings

Luc Thévenaz, Kwang-Yong Song, Sang Hoon Chin, Nikolay Primerov

We propose and experimentally demonstrate the highest-resolution BOTDA system ever reported using Brillouin dynamic grating in a polarization-maintaining fiber (PMF). Acoustic waves containing the information of local Brillouin frequency are generated by a ...

SPIE2009

General analytical model for distributed Brillouin sensors with sub-meter spatial resolution

Luc Thévenaz

A general analytic solution for Brillouin distributed fibre sensors with sub-meter spatial resolution has been obtained by solving the coupled wave equation by a perturbation method. The effect of the interaction of a square pump pulse with a continuous si ...

SPIE2009

Polarization-induced distortion in stimulated Brillouin scattering slow-light systems

Luc Thévenaz, Sang Hoon Chin

The vector analysis of stimulated Brillouin scattering amplification in birefringent fibers is extended to include signal pulses. The analysis finds that the different slow-light delays experienced by the states of polarization corresponding to maximum and ...

Optical Society of America2009

Optimized configuration for high resolution distributed sensing using Brillouin echoes

Luc Thévenaz, Stella Foaleng Mafang

A novel configuration has been developed to optimize the response of Brillouin echoes for distributed fibre sensing. Fully resolved measurements of the Brillouin frequency shift of a 5cm spot perturbation have been performed using a 500 ps (5cm) pulse widt ...

SPIE2009

Guidelines for the characterization and use of fibre optic sensors: basic definitions and a proposed standard for FBG-based strain sensors

Luc Thévenaz

This paper describes the outcome of two groups which are involved in the specification of guidelines for fibre optic sensors performance and testing. The "Guideline for use of fibre optic sensors" from the COST-299 guideline group, and the "Optical Strain ...

SPIE2009

Solution analytique de la diffusion Brillouin stimulée appliquée aux capteurs à très haute résolution spatiale

Luc Thévenaz

Nous présentons une solution analytique complète de la diffusion Brillouin basée sur une méthode de perturbation que nous appliquons aux capteurs distribués à très haute résolution spatiale. Nous décrivons complètement l’interaction entre un signal continu ...

2009

Optimized shaping of isolated pulses in Brillouin fiber slow-light systems

Luc Thévenaz, Sang Hoon Chin

The effect of a proper shaping of the temporal envelope of isolated pulses in slow-light systems based on stimulated Brillouin scattering in optical fibers is studied and experimentally demonstrated. The pulse shape can be optimized to lead to a substantia ...

Optical Society of America2009

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