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Sang Hoon Chin

Cette personne a quitté l’EPFL

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Publications associées (63)

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Simple source for broadband Brillouin slow light in optical fibers

Luc Thévenaz, Sang Hoon Chin

Spontaneously broadened emission from a distributed feedback laser diode perated just above threshold is used as a pump source in Brillouin slow light systems. The pump spectrum could this way be extended to several GHz. ...

Ieice-Inst Electronics Information & Communication Engineers, Kikai-Shinko-Kaikan Bldg 103, 5-8, Shibakoen 3 Chome, Minato-Ku, Tokyo, 105-0011, Japan2010

True Time Reversal via Dynamic Brillouin Gratings in Polarization Maintaining Fibers

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

A novel technique to realize true time reversal of an optical signal, using dynamic Brillouin gratings in high-birefringence fibers, is proposed. A data sequence of optical pulses with 2-ns duration was efficiently time-reversed. ...

Optical Society of America2010

Zero-Gain Slow Light in Optical Fibres

Luc Thévenaz, Sang Hoon Chin

Generation of optical delays with minor amplitude change are realized through the superposition of gain and loss profiles generated by stimulated Brillouin scattering. It results in synthesized spectral profiles identical to an ideal electromagnetically-in ...

IEEE2006

Extending the sensing range of Brillouin optical time-domain analysis up to 325 km combining four optical repeaters

Luc Thévenaz, Sang Hoon Chin, Flavien Gyger

A novel scheme is proposed to extend the sensing range of Brillouin optical time-domain analyzers (BOTDA). Specially-designed erbium doped fiber amplifier (EDFA) repeaters are located every 65km fiber along the sensing cable to achieve a total sensing leng ...

SPIE2014

Multi-wavelength generation based on Brillouin enhanced four-wave mixing in optical fibers

Luc Thévenaz, Sang Hoon Chin

An optical comb consisting of 15 lines within 30 dB was generated with an extremely simple setup, based on the combination of amplified spontaneous Brillouin scattering and 4-wave mixing in optical fibers. ...

Optical Society of America2011

All-Optical Self-Synchronizing Scheme for Contention Resolution in Asynchronous Optical Packet Switched Networks Using Continuously Tunable Optical Delay Line

Luc Thévenaz, Sang Hoon Chin

Continuously tunable, optically-controlled variable delay line based on dynamic Brillouin grating is exploited for automated synchronization of switching signals in a network node, enabling asynchronous contention resolution with packet priorization. ...

Optical Society of America2011

Flexible Slow and Fast Light Using Tailored Brillouin Spectra in Optical Fibers

Luc Thévenaz, Sang Hoon Chin, Kwang-Yong Song

Stimulated Brillouin scattering makes possible the generation of synthesized gain spectra, so that innovative slow light schemes can be realized, ranging from broadband tunable delays to a zero-gain situation identical to an ideal electromagnetically-induc ...

OSA2006

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

All-optical calculus based on dynamic Brillouin grating reflectors in optical fibers

Luc Thévenaz, Sang Hoon Chin, Nikolay Primerov

We experimentally demonstrate that all-optical signal calculus can be realized based on dynamic Brillouin gratings in optical fibers. Temporal integration and first-order differentiation were performed for optical pulse with various waveforms. ...

Optical Society of America2011

Movable dynamic grating-based optical delay line in polarization maintaining fibers

Luc Thévenaz, Sang Hoon Chin, Nikolay Primerov

A new type of all optical delay line is realized in fibers. A local dynamic grating reflector can be generated everywhere in the fiber, demonstrating >1 us delay for 650 ps pulses. ...

Optical Society of America2011

Enhancing the light-matter interaction using slow light: towards the concept of dense light

Luc Thévenaz, Sang Hoon Chin, Isabelle Dicaire

A couple of experiments are here presented to clarify the impact of slow light on light-matter interaction. The experiments are designed, so that the process generating slow light and the probed light-matter interaction only present a marginal cross-effect ...

Society of Photo-Optical Instrumentation Engineers (SPIE)2012

Double-pulse Brillouin distributed optical fiber sensors: analytical model and experimental validation

Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Sang Hoon Chin

An analytical model is presented to describe the behavior of the acoustic wave, probe signal and Brillouin gain in double-pulse Brillouin optical time-domain analysis (DP-BOTDA) sensors. The proposed model is a tool that provides a full physical insight in ...

Spie-Int Soc Optical Engineering2012

Ultra Wide Range Tunable Delay Line Using Dynamic Grating Reflectors in Optical Fibers

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

We experimentally demonstrate a novel technique to realize a tunable delay line based on dynamic Brillouin gratings in a high birefringence fiber. A 8ns pulse signal is continuously delayed up to 184ns with minor distortion. ...

Optical Society of America2010

Advanced Brillouin-based distributed optical fibre sensors with sub-meter scale spatial resolution

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

Classical configurations of Brillouin distributed optical fibre sensors show a spatial resolution limited by the phonon lifetime to 1 meter. Novel approaches can substantially overcome this limit through the prior activation of the acoustic wave. ...

IEEE2010

Fiber sensing system based on a bragg grating and optical time domain reflectometry

Luc Thévenaz, Sang Hoon Chin

Optic fiber sensor characterized in that the sensing fiber is provided with a continuous Bragg grating covering the entire fiber length which is dedicated to sensing and along which spatially resolved measurements are performed. ...

World Intellectual Property Organization2013

Recent advancement of slow light in microwave photonics applications

Luc Thévenaz, Sang Hoon Chin

A complete realization of an optically tunable true time delay, generated through the combination of a photonic RF phase shifter and a Brillouin slow light element is presented. Illustration through a dynamic microwave photonic filter is demonstrated. ...

IEEE2010

Structural slow light can enhance Beer-Lambert absorption

Luc Thévenaz, Sang Hoon Chin, Isabelle Dicaire

We experimentally demonstrate that structural slow light can enhance Beer-Lambert absorption. A 4-fold reduction of the group velocity induced by mere cavity effects has caused an increase of molecular absorption by 130%. ...

Optical Society of America2011

Progress in Brillouin Slow Light and Its Impact in Fiber Sensing

Luc Thévenaz, Sang Hoon Chin, Kwang-Yong Song

This paper reviews the major advances in Brillouin slow light devices along the last two years. We also focus on the positive and negative implications of this effect in the development of fiber sensors. ...

Optical Society of America2006

Optical pulse differentiation based on a resonant slow & fast light system

Luc Thévenaz, Sang Hoon Chin

We experimentally demonstrate that temporal differentiation of optical pulses can be realized in a slow & fast light system based on a resonance. The waveform of a 13 ns Gaussian pulse was experimentally first-order differentiated. ...

Optical Society of America2011

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

Luc Thévenaz, Sang Hoon Chin

Optical Society of America2009