Performance analysis of Brillouin optical time domain reflectometry (BOTDR) employing wavelength diversity and passive depolarizer techniques

Lalam, Nageswara, Ng, Wai Pang, Dai, Xuewu, Wu, Qiang and Fu, Yong Qing (2018) Performance analysis of Brillouin optical time domain reflectometry (BOTDR) employing wavelength diversity and passive depolarizer techniques. Measurement Science and Technology, 29 (2). 025101. ISSN 0957-0233

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Lalam+et+al_2017_Meas._Sci._Technol._10.1088_1361-6501_aa9c6e.pdf - Accepted Version
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Official URL: https://doi.org/10.1088/1361-6501/aa9c6e

Abstract

We propose and experimentally validate a wavelength diversity technique combined with a passive depolarizer to improve the performance of Brillouin optical time domain reflectometry (BOTDR). This technique enables the maximization of the launch pump power and suppresses the nonlinear effects, the latter of which limits the conventional BOTDR performance. As a result, the signal-to-noise ratio (SNR) increases, thus improving the measurement accuracy for strain and temperature. In addition, considering the complexity and expensive methods required for polarization noise suppression in BOTDR system, a simple, lowcost passive depolarizer is employed to reduce the polarization noise. The experimental results show that the SNR is improved by 4.85 dB, which corresponds to 174% improvement compared to a conventional BOTDR system.

Item Type: Article
Uncontrolled Keywords: Brillouin scattering, passive depolarizer, wavelength diversity
Subjects: H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 27 Nov 2017 12:59
Last Modified: 13 Apr 2018 17:14
URI: http://nrl.northumbria.ac.uk/id/eprint/32646

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