Analysis on the employment of dual walsh codes in the phase-shift pulse BOTDA (PSP-BOTDA) fiber sensing technique

M. S D Zan, A. A A Bakar, Tsuneo Horiguchi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publication2016 IEEE 6th International Conference on Photonics, ICP 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781467381536
DOIs
Publication statusPublished - 2016 Jul 12
Event6th IEEE International Conference on Photonics, ICP 2016 - Kuching, Sarawak, Malaysia
Duration: 2016 Mar 142016 Mar 17

Other

Other6th IEEE International Conference on Photonics, ICP 2016
CountryMalaysia
CityKuching, Sarawak
Period16/3/1416/3/17

Keywords

  • BOTDA
  • distributed fiber sensor
  • stimulated Brillouin scattering

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Computer Networks and Communications

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    Zan, M. S. D., Bakar, A. A. A., & Horiguchi, T. (2016). Analysis on the employment of dual walsh codes in the phase-shift pulse BOTDA (PSP-BOTDA) fiber sensing technique. In 2016 IEEE 6th International Conference on Photonics, ICP 2016 [7510014] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICP.2016.7510014