1 April 2009 Vibration-displacement measurements based on the phase tracking of an optical fiber Michelson interferometer
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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.
© (2009) Society of Photo-Optical Instrumentation Engineers (SPIE)
Fang Xie, Fang Xie, Zhimin Chen, Zhimin Chen, Junyu Ren, Junyu Ren, Qibo Feng, Qibo Feng, } "Vibration-displacement measurements based on the phase tracking of an optical fiber Michelson interferometer," Optical Engineering 48(4), 043608 (1 April 2009). https://doi.org/10.1117/1.3122317 . Submission:
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