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Sang Hoon Chin

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Publications associées (63)

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

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

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, Andrea Trita

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

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 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

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

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

Broadband true time delay for microwave signal processing, using slow light based on stimulated Brillouin scattering in optical fibers

Luc Thévenaz, Sang Hoon Chin

We experimentally demonstrate a novel technique to process broadband microwave signals, using all-optically tunable true time delay in optical fibers. The configuration to achieve true time delay basically consists of two main stages: photonic RF phase shi ...

Optical Society of America2010

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

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

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

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

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 Reversal through Dynamic Brillouin Gratings in Polarization Maintaining Fibers

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

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

True Time Reversal via Dynamic Brillouin Gratings in Polarization Maintaining Fibers

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

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

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

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

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

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