Experimental Study on Distributed interferometric Fiber-Optic Vibration Sensor

Abstract

Abstract: In order to implement the community perimeter security detection without electromagnetic interference, developed a new type of distributed interferometric fiber optic vibration sensor, the photosensitive fiber based on MZ interference type of the road, by using interference detection cable vibration, a plot fiber perimeter detection sensors, when there is external invasion disturbances of sensing optical fiber, receives the interference fringe can produce significant change, thus the perimeter security early warning is given. Respectively by the frequency of 14.6678 Hz and 20.2012 Hz triangle wave as modulation signal has carried on the experimental study, results show that the interferometric disturbance detection system is very sensitive, as long as there is a slight cable touches, waveform will have obvious change, it is easy to distinguish between presence of external disturbances, is of great significance to safety.

Key words: M - Z, Optical fiber sensor, Interferometric, vibration

CLC Number:

TN253

ZHANG You-neng， WANG Da-Wen， DING Li. Experimental Study on Distributed interferometric Fiber-Optic Vibration Sensor[J]. J4, 2014, 31(3): 361-367.

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