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Optical Engineering

Vibration-displacement measurements based on the phase tracking of an optical fiber Michelson interferometer
Author(s): Fang Xie; Zhimin Chen; Junyu Ren; Qibo Feng
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Paper Abstract

A vibration-displacement measurement system based on tracking the phase variation of an optical fiber Michelson interferometer with electronic feedback loops is presented. The measurement system includes two sets of electronic feedback loops. One electronic feedback loop is used to compensate for the low frequency drifts in the phase of the interferometric signal that results from environmental disturbances, while the other one is used to track the phase variation induced by the measured vibration displacement, and thus realize the measurement of the vibration displacement and provide a sense of direction of the displacement simultaneously. The measurement system is designed to be capable of measuring vibration displacement with frequencies ranging from 1.5 to 200 Hz, with measurement resolution reaching 13 nm.

Paper Details

Date Published: 1 April 2009
PDF: 6 pages
Opt. Eng. 48(4) 043608 doi: 10.1117/1.3122317
Published in: Optical Engineering Volume 48, Issue 4
Show Author Affiliations
Fang Xie, Beijing Jiaotong Univ. (China)
Zhimin Chen, Beijing Jiaotong Univ. (China)
Junyu Ren, Beijing Jiaotong Univ. (China)
Qibo Feng, Beijing Jiaotong Univ. (China)

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