Recherche

Afficher tous les résultats pour

Accueil

Personne

Sang Hoon Chin

Cette personne a quitté l’EPFL

À propos
Confidentialité
Mentions légales

Graph Chatbot

Publications associées (63)

Page 2 sur 4

Dual-pump sweep-free stimulated Brillouin optical distributed sensing method and device

Luc Thévenaz, Sang Hoon Chin

The present invention concerns a Brillouin optical distributed sensing method, comprising steps of: (i) providing a first and a second optical pulsed pump wave (20, 23) and an optical probe wave comprising at least one probe spectral component (26), (ii) d ...

World Intellectual Property Organization2014

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

Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Sang Hoon Chin

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

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

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

Polarization pulling based on stimulated Brillouin scattering in a dual-pump configuration

Luc Thévenaz, Sang Hoon Chin, Nikolay Primerov

Stimulated Brillouin scattering (SBS) amplification of probe signals is highly polarization dependent. Maximum and minimum gain values are associated with a pair of orthogonal states of polarization (SOP) at the fiber output. Since the maximum gain is much ...

SPIE2011

Time-Domain Distributed Fiber Sensor With 1 cm Spatial Resolution Based on Brillouin Dynamic Grating

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

We demonstrate an optical time-domain distributed fiber sensor showing the highest spatial resolution ever reported based on Brillouin dynamic grating in a polarization-maintaining fiber. In our scheme, the acoustic gratings containing the information on t ...

IEEE Institute of Electrical and Electronics Engineers2010

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

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

Tunable multiplication of the repetition rate of an optical pulse train using dynamic Brillouin gratings in optical fibers

Luc Thévenaz, Sang Hoon Chin, Nikolay Primerov

We here propose a novel technique for realizing the multiplication of the pulse repetition rate with a flexibly tunable multiplication factor, based on dynamic Brillouin grating (DBG) reflectors implemented in highly birefringent fibers. ...

Optical Society of America2011

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

Dynamic Microwave Photonic Filter Using Separate Carrier Tuning Based on Stimulated Brillouin Scattering in Fibers

Luc Thévenaz, Sang Hoon Chin

Dynamic reconfiguration of a microwave photonic filter by tuning its basic delay based on stimulated Brillouin scattering-induced slow light and optical phase shift of the optical carrier is experimentally implemented. The measurements confirm that the fre ...

2010

Experimental verification of the effect of slow light on molecular absorption

Luc Thévenaz, 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

True Time Reversal through 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. A numerical simulation of ...

2010

All-optical signal processing using dynamic Brillouin gratings

Luc Thévenaz, Sang Hoon Chin, Nikolay Primerov

The manipulation of dynamic Brillouin gratings in optical fibers is demonstrated to be an extremely flexible technique to achieve, with a single experimental setup, several all-optical signal processing functions. In particular, all-optical time differenti ...

Nature Publishing Group2013

All-optical storage and processing in optical fibers

Luc Thévenaz, Sang Hoon Chin, Nikolay Primerov, Andrey Denisov

The recent possibility to generate and read dynamic Bragg gratings in optical fibers by the interaction of multiple optical waves through stimulated Brillouin scattering has opened a new field to realize all-optical fiber-based functions. ...

IEEE2012

Photonic delay line for broadband optical signals, based on dynamic grating reflectors in fibers

Luc Thévenaz, Sang Hoon Chin, Nikolay Primerov

We experimentally demonstrate that a novel type of photonic delay line based on movable dynamic grating reflectors generated in polarization maintaining fibers can provide continuously tunable signal delaying for high capacity optical data streams and wide ...

IEEE2010

True Time Delay on tunable Microwave Photonic Filter based on Stimulated Brillouin Scattering in fibers

Luc Thévenaz, Sang Hoon Chin

A dynamically reconfigurable Microwave Photonic Filter based on True Time Delay generated by Stimulated Brillouin Scattering in optical fibers and separate phase shift of the optical carrier has been experimentally demonstrated, resulting in a flexible tun ...

IEEE2010

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

Dynamic Brillouin gratings: A new tool in fibers for all-optical signal processing

Luc Thévenaz, Sang Hoon Chin, Nikolay Primerov

The recent possibility to generate dynamic Bragg gratings by the interaction of 2 optical waves through stimulated Brillouin scattering in highly birefringent fibers has opened a new field to realize all-optical fiber-based functions. ...

IEEE2011

High Spatial and Spectral Resolution Long-Range Sensing Using Brillouin Echoes

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

While classical configurations have a practical spatial resolution of 1 meter, novel approaches have been demonstrated that can overcome this limit to offer spatial resolutions in the centimetre range, while preserving full measurand accuracy. ...

Optical Society of America2011

Simplified Brillouin fiber slow light systems in loss regime using step current modulation

Luc Thévenaz, Sang Hoon Chin

We propose a simple technique to realize Brillouin slow light in nearly transparent regime. A current-modulated semiconductor laser by a step function is used as Brillouin pump to generate a Brillouin loss doublet. ...

Optical Society of America2011