TY - GEN
T1 - Combined time-domain and correlation-domain Brillouin analysis with 1600 meters range and 2 centimeters resolution
AU - Elooz, David
AU - Antman, Yair
AU - Zadok, Avi
PY - 2014
Y1 - 2014
N2 - A combined time-domain and correlation-domain Brillouin sensing scheme is demonstrated. Pump and signal waves are phase modulated by a high-rate, perfect Golomb code, which confines their interaction to discrete, 2 cm-long correlation peaks. The properties of the code substantially reduce off-peaks interactions. The pump wave is also amplitude modulated by a single pulse, so that amplifications at different correlation peaks can be separated in the time domain. The Brillouin gain spectra at all 80,000 resolution points of a 1,600 m-long fiber are reconstructed experimentally, using only 127 scans per frequency. A 3 cm-long hot spot is recognized.
AB - A combined time-domain and correlation-domain Brillouin sensing scheme is demonstrated. Pump and signal waves are phase modulated by a high-rate, perfect Golomb code, which confines their interaction to discrete, 2 cm-long correlation peaks. The properties of the code substantially reduce off-peaks interactions. The pump wave is also amplitude modulated by a single pulse, so that amplifications at different correlation peaks can be separated in the time domain. The Brillouin gain spectra at all 80,000 resolution points of a 1,600 m-long fiber are reconstructed experimentally, using only 127 scans per frequency. A 3 cm-long hot spot is recognized.
KW - Brillouin correlation domain analysis
KW - Dynamic gratings
KW - Optical fiber sensors
KW - Stimulated Brillouin scattering
UR - http://www.scopus.com/inward/record.url?scp=84903193123&partnerID=8YFLogxK
U2 - 10.1117/12.2059544
DO - 10.1117/12.2059544
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AN - SCOPUS:84903193123
SN - 9781628411751
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - 23rd International Conference on Optical Fibre Sensors
PB - SPIE
T2 - 23rd International Conference on Optical Fibre Sensors
Y2 - 2 June 2014 through 6 June 2014
ER -