We make an experimental study on vibration frequency response of micro-bend optic-fiber sensor, and single-mode fibers and multi-mode fibers are used as the sensitive optic-fibers. Contrast between the two sensitive fibers is presented. Result shows that the micro-bend optic-fiber sensor has good frequency response characteristics and strong ability to restore the waveform. With the frequency varying in the range of 500-4762 Hz, the vibration sensors using multi-mode optic-fiber as the sensitive fiber is more sensitive than that using single-mode optic-fiber. And the former has better frequency response characteristics and stronger capacity of waveform revivification. But with the frequency in the range of 287-500 Hz, the latter is better.
© 2009 Chinese Optics Letters
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(280.0280) Remote sensing and sensors : Remote sensing and sensors
Fuxiang Qin, Honggang Li, Wande Fan, and and Qiuqin Sheng, "Experimental study on vibration frequency response of micro-bend optic-fiber sensor," Chin. Opt. Lett. 7, 556-559 (2009)