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Sang Hoon Chin

Cette personne n’est plus à l’EPFL

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Publications associées (63)

Governing the speed of a light signal in optical fibers : Brillouin slow and fast light

Sang Hoon Chin

Dynamic control of the speed of a light signal, based on stimulated Brillouin scattering in optical fibers, was theoretically studied and also experimentally demonstrated as the core object of this thesis. To date, slow light based on stimulated Brillouin ...

EPFL2009

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

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

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

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

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

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

Material Slow Light Does Not Enhance Beer-Lambert Absorption

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

Optical Society of America2009

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

Luc Thévenaz, Sang Hoon Chin

Optical Society of America2009

Polarization Dependent Pulse Distortion in Stimulated Brillouin Scattering Slow Light Systems

Luc Thévenaz, Sang Hoon Chin

Optical Society of America2009

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

Simple technique to achieve fast light in gain regime using Brillouin scattering

Luc Thévenaz, Sang Hoon Chin

We describe a novel technique based on stimulated Brillouin scattering for propagating fast light (signal advancement) with low distortion in optical fibers. The essence of the technique relies on the presence of two separate gain resonances in the Brillou ...

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

Low Distortion Fast Light in an Optical Fiber Using Stimulated Brillouin Scattering

Luc Thévenaz, Sang Hoon Chin

We demonstrate expeimentally a novel approach for fast light generation based on a wideband compound spectral resonance using stimulated Brillouin scattering. The pulses experience fast light with extremely reduced distortion and small amplitude change. ...

OSA2007

Self-Advanced Propagation of Light Pulse in an Optical Fiber Based on Brillouin Scattering

Luc Thévenaz, Sang Hoon Chin

We propose a novel method to realize self-induced fast light and signal advancement with no distinct pump source in optical fibers, based on stimulated Brillouin scattering. This scheme will be helpful for real application systems. ...

OSA2007

Frequency-stabilised laser reference system for trace-gas sensing applications from space

Luc Thévenaz, Laura Abrardi, Daniela Werner, Sang Hoon Chin

A four-wavelength low-power continuous-wave frequency laser reference system has been realised in the 935.4-nm range for water vapour differential absorption lidar (DIAL) applications. The system is built around laboratory extended-cavity and DFB diode las ...

ESA2006

Flexible Slow and Fast Light in Optical Fibers

Luc Thévenaz, Kwang-Yong Song, Sang Hoon Chin

A method to achieve an extremely wide and flexible control of the group velocity in an optical fiber using stimulated Brillouin scattering is presented. Group velocities below 71,000 km/s on one hand, well exceeding the speed of light in vacuum on the othe ...

IEEE2006

La lumière lente et rapide: une future pièce maîtresse pour la photonique

Luc Thévenaz, Kwang-Yong Song, Sang Hoon Chin

Nous présentons une technique permettant de réaliser un contrôle extensif et très souple de la vitesse de groupe de signaux se propageant dans une fibre optique. Ce contrôle, directement piloté par une source lumineuse, est effectué par le truchement de ga ...

2006

Zero-gain slow and fast light propagation in an optical fiber

Luc Thévenaz, Sang Hoon Chin

Slow and fast light with null amplification or loss of a light signal is experimentally demonstrated. This novel method for producing zero-gain slow and fast light takes advantage of the great flexibility of stimulated Brillouin scattering in optical fiber ...

2006

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