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Proceedings Paper

Distributed fiber optic perturbation locating sensor based on dual Mach-Zehnder interferometer
Author(s): Guangming Luo; Chunxi Zhang; Lijing Li; Zongfeng Ma; Tian Lan; Chen Li; Wentai Lin
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Paper Abstract

This paper studies a distributed fiber optic perturbation locating sensor used for security system, which is based on dual Mach-Zehnder interferometers. This system consists of two Mach-Zehnder interferometers with the common sensing arm, reference arm, two couplers and one laser source. This kind of distributed fiber optic perturbation locating sensor is very suitable for the measurement of the phase shift induced by some perturbation such as strain and vibration. When perturbation exerts on the sensing arm, a time delay will generate between the two output signals of the dual Mach-Zehnder interferometers. From the time delay, the location of the perturbation can be obtained. Experimenting on the type disturbance's optic cable and forcing on the 18.46km long distance fiber, the system correctly shows the position for real time and the average error is 390m. The experiment shows that the system can be applicable for locating on 40km distance fiber cable when the power of the laser resource increases to 300μW.

Paper Details

Date Published: 22 February 2008
PDF: 7 pages
Proc. SPIE 6622, International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology, 66220Z (22 February 2008); doi: 10.1117/12.790814
Show Author Affiliations
Guangming Luo, Beijing Univ. of Aeronautics and Astronautics (China)
Chunxi Zhang, Beijing Univ. of Aeronautics and Astronautics (China)
Lijing Li, Beijing Univ. of Aeronautics and Astronautics (China)
Zongfeng Ma, Beijing Univ. of Aeronautics and Astronautics (China)
Tian Lan, Beijing Univ. of Aeronautics and Astronautics (China)
Chen Li, Beijing Univ. of Aeronautics and Astronautics (China)
Wentai Lin, Beijing Univ. of Aeronautics and Astronautics (China)


Published in SPIE Proceedings Vol. 6622:
International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology

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