TY - GEN
T1 - The use of Walsh functions in modulating pump light of high-spatial- resolution BOTDA with NRZ pulses
AU - Bin Zan, Mohd Saiful Dzulkefly
AU - Tsumuraya, Tatsuya
AU - Horiguchi, Tsuneo
PY - 2012/12/1
Y1 - 2012/12/1
N2 - We have previously introduced phase modulation into pulsed pump of Brillouin Optical Time Domain Analysis (BOTDA) in order to obtain high spatial resolution. In this study, we propose to use Walsh functions in coding nonreturn-to-zero (NRZ) formatted pump pulses of the high-spatial-resolution BOTDA to increase signal-to-noise ratio (SNR). Contrary to previous reports, it is numerically and experimentally verified that the use of the Walsh functions in the high-spatial-resolution BOTDA allows the increase in SNR without deteriorating its spatial resolution expected. We demonstrate measurements with 1.5 dB improvement in SNR and with approximately 0.2 m spatial resolution.
AB - We have previously introduced phase modulation into pulsed pump of Brillouin Optical Time Domain Analysis (BOTDA) in order to obtain high spatial resolution. In this study, we propose to use Walsh functions in coding nonreturn-to-zero (NRZ) formatted pump pulses of the high-spatial-resolution BOTDA to increase signal-to-noise ratio (SNR). Contrary to previous reports, it is numerically and experimentally verified that the use of the Walsh functions in the high-spatial-resolution BOTDA allows the increase in SNR without deteriorating its spatial resolution expected. We demonstrate measurements with 1.5 dB improvement in SNR and with approximately 0.2 m spatial resolution.
KW - BOTD1 fiber sensor
KW - Brillouin frequency shift
KW - Stimulated Brillouin scattering (SBS)
KW - Walsh functions
UR - http://www.scopus.com/inward/record.url?scp=84875601273&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84875601273&partnerID=8YFLogxK
U2 - 10.1117/12.968584
DO - 10.1117/12.968584
M3 - Conference contribution
AN - SCOPUS:84875601273
SN - 9780819491039
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - 22nd International Conference on Optical Fiber Sensors
T2 - 22nd International Conference on Optical Fiber Sensors
Y2 - 15 October 2012 through 19 October 2012
ER -