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Proceedings Paper

Increasing the frequency response of direct-detection phase-sensitive OTDR by using frequency division multiplexing
Author(s): Guangyao Yang; Xinyu Fan; Qingwen Liu; Zuyuan He
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Paper Abstract

The frequency division multiplexing (FDM) technique is firstly introduced into a direct-detection phase-sensitive OTDR to improve the distributed fiber acoustic sensing performance by using a frequency step sweeping laser source and a dual probe pulse scheme. By using FDM technique, a 40 kHz sampling rate to vibration is realized with a 10 km measurement range, which implies the tradeoff between the frequency response and the measurement range is broken. In experiment, a 6 kHz vibration is successfully measured.

Paper Details

Date Published: 23 April 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103238F (23 April 2017); doi: 10.1117/12.2265632
Show Author Affiliations
Guangyao Yang, Shanghai Jiao Tong Univ. (China)
Xinyu Fan, Shanghai Jiao Tong Univ. (China)
Qingwen Liu, Shanghai Jiao Tong Univ. (China)
Zuyuan He, Shanghai Jiao Tong Univ. (China)

Published in SPIE Proceedings Vol. 10323:
25th International Conference on Optical Fiber Sensors
Youngjoo Chung; Wei Jin; Byoungho Lee; John Canning; Kentaro Nakamura; Libo Yuan, Editor(s)

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