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Proceedings Paper

Positioning method for dual Mach-Zehnder interferometric submarine cable security system
Author(s): Shangran Xie; Min Zhang; Shurong Lai; Yanbiao Liao
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Paper Abstract

Dual Mach-Zehnder interferometric fiber sensor is one of the appropriate solutions to the application of submarine cable security. While the seabed environment makes the vibration output a narrow bandwidth lowpass interference signal and these property makes the correlation based event positioning algorithm hard to design. A preprocessing method intends to increase signal power spectral range before correlation is proposed. A bandpass filter is imposed to enhance the effect of high frequency components, despite the filtered signal is different from the original one. A post-integration SNR threshold is calculated to determine the proper center frequency and bandwidth of the filter. Experiment results show a good accordance with theoretical prediction.

Paper Details

Date Published: 23 April 2010
PDF: 4 pages
Proc. SPIE 7677, Fiber Optic Sensors and Applications VII, 76770A (23 April 2010); doi: 10.1117/12.850115
Show Author Affiliations
Shangran Xie, Tsinghua Univ. (China)
Min Zhang, Tsinghua Univ. (China)
Shurong Lai, Tsinghua Univ. (China)
Yanbiao Liao, Tsinghua Univ. (China)


Published in SPIE Proceedings Vol. 7677:
Fiber Optic Sensors and Applications VII
Alexis Mendez; Henry H. Du; Anbo Wang; Eric Udd; Stephen J. Mihailov, Editor(s)

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