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Luc Thévenaz

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Publications associées (373)

Optical sinc-shaped Nyquist pulses with very low roll-off generated from a rectangular frequency comb

Luc Thévenaz, Mohammad Mehdi Alem Karladani, Marcelo Alfonso Soto Hernandez, Camille Sophie Brès, Mohammad Amin Shoaie

High-quality optical sinc-shaped Nyquist pulses with a virtual zero roll-off factor are obtained from the generation of a phase-locked, rectangular-spectrum frequency comb. Tunability over more than 4 frequency decades is demonstrated with

Optical Society of America2013

Effect of pulse depletion in a Brillouin optical time-domain analysis system

Luc Thévenaz, Stella Foaleng Mafang, Jie Lin

Energy transfer between the interacting waves in a distributed Brillouin sensor can result in a distorted measurement of the local Brillouin gain spectrum, leading to systematic errors. It is demonstrated that this depletion effect can be precisely modelle ...

Optical Society of America2013

Brillouin Optical Time-Domain Analysis: pushing back the frontiers

Luc Thévenaz

These past few years the steady demand from end users has deeply stimulated the research in the field of distributed fibre sensors based on stimulated Brillouin scattering. Some recent progresses are here reported, pushing the limits beyond what has been c ...

Nanjing University2012

Differential Phase-Shift-Keying Technique-Based Brillouin Echo-Distributed Sensing

Luc Thévenaz

In this letter, we experimentally demonstrate Brillouin echoes-based distributed optical fiber sensing with centimeter spatial resolution. It is based on a differential phase-shift-keying technique using a single Mach–Zehnder modulator to generate a pump p ...

2012

Tunable photonic delay lines in optical fibers

Luc Thévenaz, Sang Hoon Chin

A comprehensive overview is presented about optical fiber-based tunable photonic delay lines, which have been steadily developed over the last decade for the realization of all-optically controlled timing functions. The most widely used techniques, such as ...

Wiley-V C H Verlag Gmbh2012

Bipolar pulse coding for enhanced performance in Brillouin distributed optical fiber sensors

Luc Thévenaz, Marcelo Alfonso Soto Hernandez

We propose and experimentally demonstrate the possibility to use a pump signal based on bipolar pulse sequences using single-sideband suppressed-carrier (SSB-SC) modulation in Brillouin optical time-domain analysis (BOTDA) sensors. The SSB-SC modulated pum ...

Spie-Int Soc Optical Engineering2012

Tunable and reconfigurable multi-tap microwave photonic filter based on dynamic Brillouin gratings in fibers

Luc Thévenaz, Sang Hoon Chin, Nikolay Primerov

We propose and experimentally demonstrate new architectures to realize multi-tap microwave photonic filters, based on the generation of a single or multiple dynamic Brillouin gratings in polarization maintaining fibers. The spectral range and selectivity o ...

Optical Society of America2012

Opto-acoustic coupling and Brillouin phenomena in microstructure optical fibers

Luc Thévenaz, Stella Foaleng Mafang, Duc Minh Nguyen

Like photonic crystals have revolutionized the way of manipulating optical waves at the sub-micron scale, phononic crystals have more recently played similar decisive role for sound waves, or more generally elastic waves. Then, the idea of coupling light a ...

IEEE2012

Sub-centimetre Spatial Resolution in Distributed Fibre Sensing, based on Dynamic Brillouin Grating in Optical Fibers

Luc Thévenaz, Sang Hoon Chin, Nikolay Primerov

Optical fibre sensors based on stimulated Brillouin scattering in optical fibers 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 t ...

2012

Slow Light Devices and Their Applications to Microwaves and Photonics

Luc Thévenaz

Recently developed, highly effective technologies enabling slow light propagation as a tunable feature in photonic devices, are reviewed. Several applications in ICT are also demonstrated. Controlling the group velocity of light offers a broadband solution ...

2012

Random-access distributed fiber sensing

Luc Thévenaz, Nikolay Primerov, Andrey Denisov

Optical sensing offers an attractive solution to the societal concern for prevention of natural and human-generated threats and for efficient use of natural resources. The unprecedented properties of optical fibers make them ideal for implementing a ‘nervo ...

Wiley-VCH Verlag Berlin2012

Probing molecular absorption under slow light propagation using a photonic crystal waveguide

Luc Thévenaz, Isabelle Dicaire

High-resolution infrared absorption spectroscopy of acetylene gas is demonstrated in dispersion-engineered photonic crystal waveguides under slow light propagation. Individual absorption profiles are obtained for both TE and TM polarizations for group indi ...

Society of Photo-Optical Instrumentation Engineers (SPIE)2012

Optical Fibre optimized for the Reduction of Nonlinear effects

Luc Thévenaz

An optical fibre designed to simultaneously attenuate the effect of modulation instability and stimulated Raman scattering. A first solution proposes to use non-zero dispersion shifted fibres in the normal dispersion regime to reduce both influences at the ...

World Intellectual Property Organization2012

Rating the performance of a Brillouin distributed fiber sensor

Luc Thévenaz, Marcelo Alfonso Soto Hernandez

The effect of the characteristics of a generic distributed fiber sensor based on stimulated Brillouin scattering on the amplitude of the response is analyzed and a relation between the measurement noise on the time traces and the error on the determination ...

Spie-Int Soc Optical Engineering2012

Kerr effect in structured superluminal media

Luc Thévenaz, Sang Hoon Chin, Andrey Denisov

Society of Photo-Optical Instrumentation Engineers (SPIE)2012

Time/frequency coding for Brillouin distributed sensors

Luc Thévenaz, Marcelo Alfonso Soto Hernandez

In this paper, we propose a novel coding for long range Brillouin Optical Time Analysis (BOTDA) distributed sensors based on a combination of time and frequency pulses, resulting in an additional coding gain of √2 with respect to traditional intensit ...

2012

Brillouin optical time-domain analysis over a 240 km-long fiber loop with no repeater

Luc Thévenaz, Sang Hoon Chin, Marcelo Alfonso Soto Hernandez

In this paper we combine the use of optical pulse coding and seeded second-order Raman amplification to extend the sensing distance of Brillouin optical time-domain analysis (BOTDA) sensors. Using 255-bit Simplex coding, the power levels of the Raman pumps ...

2012

Analytical expression of pulse broadening in an arbitrary linear slow light medium

Luc Thévenaz

We derive an analytical expression for the broadening of a Gaussian input pulse in an arbitrary linear slow light medium. The expression consists of two terms, one corresponding to amplitude broadening (low-pass filtering of the pulse bandwidth) and anothe ...

2012

Distributed sensing employing stimulated Brillouin scattering in optical fibers

Luc Thévenaz

Disclosed are methods and devices for distributed sensing of a measurable parameter employing stimulated Brillouin scattering in an optical fiber. A frequency-modulated or phase-modulated light wave is transmitted into the optical fiber. A scattered light ...

World Intellectual Property Organization2012

Gas Sensing using Material and Structural Slow Light Systems

Luc Thévenaz, Sang Hoon Chin, Isabelle Dicaire

Slowing light is expected to enhance light-matter interaction, leading to more compact sensing devices. By simple tests we show that the reality is more complex and the only relevant quantity is the wave electric field. ...

Optical Society of America2012

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