TY - GEN
T1 - Analysis on the employment of dual walsh codes in the phase-shift pulse BOTDA (PSP-BOTDA) fiber sensing technique
AU - Zan, M. S.D.
AU - Bakar, A. A.A.
AU - Horiguchi, T.
N1 - Publisher Copyright:
© 2016 IEEE.
Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 2016/7/12
Y1 - 2016/7/12
N2 - We propose a technique to modulate the pump light of phase-shift pulse Brillouin optical time domain analysis (PSP-BOTDA) with Walsh code in a nested configuration. We call it dual Walsh codes PSP-BOTDA. In this technique, two Walsh codes are each assigned to return-to-zero (RZ) and non-return-to-zero (NRZ) pulses. Simulation and experiment results have shown that the assignment of Walsh to the non-return-to-zero (NRZ) pulses even for code duration of longer than the time constant of the acoustic wave still attains the theoretical spatial resolution of the Brillouin signal, in contrast to that of previously proposed dual Golay codes PSP-BOTDA. In terms of the optical signal-to-noise ratio (SNR), we obtained a maximum of improvement of 5.4 dB, compared to the conventional technique.
AB - We propose a technique to modulate the pump light of phase-shift pulse Brillouin optical time domain analysis (PSP-BOTDA) with Walsh code in a nested configuration. We call it dual Walsh codes PSP-BOTDA. In this technique, two Walsh codes are each assigned to return-to-zero (RZ) and non-return-to-zero (NRZ) pulses. Simulation and experiment results have shown that the assignment of Walsh to the non-return-to-zero (NRZ) pulses even for code duration of longer than the time constant of the acoustic wave still attains the theoretical spatial resolution of the Brillouin signal, in contrast to that of previously proposed dual Golay codes PSP-BOTDA. In terms of the optical signal-to-noise ratio (SNR), we obtained a maximum of improvement of 5.4 dB, compared to the conventional technique.
KW - BOTDA
KW - distributed fiber sensor
KW - stimulated Brillouin scattering
UR - http://www.scopus.com/inward/record.url?scp=84981725155&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84981725155&partnerID=8YFLogxK
U2 - 10.1109/ICP.2016.7510014
DO - 10.1109/ICP.2016.7510014
M3 - Conference contribution
AN - SCOPUS:84981725155
T3 - 2016 IEEE 6th International Conference on Photonics, ICP 2016
BT - 2016 IEEE 6th International Conference on Photonics, ICP 2016
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 6th IEEE International Conference on Photonics, ICP 2016
Y2 - 14 March 2016 through 17 March 2016
ER -