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Optical Engineering

Vibration insensitive optical fiber current sensor with a modified reciprocal reflection interferometer
Author(s): Hermann Lin; Wuu Wen Lin; Mao-Hsiung Chen; Shih-Chu Huang
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Paper Abstract

A modified reciprocal reflection interferometer (MRRI) is proposed for vibration insensitive optical fiber current sensors (OFCSs). The verifications of experiments are in good agreement with our theoretical analyses. A large vibrational perturbation applied to a segment of lead fiber to simulate the disturbance to the OFCS can be suppressed over 20 dB compared with a conventional reciprocal reflection interferometer (RRI). The noise floor of the OFCS with an MRRI under perturbations is about 1.36 Armsturns/Hz1/2 near the shot noise limit. A good linear demodulation result is obtained and the evaluation of the Verdet constant 1.1?rad/Arms turns approximates the literatural data measured in static environment.

Paper Details

Date Published: 1 October 1999
PDF: 8 pages
Opt. Eng. 38(10) doi: 10.1117/1.602224
Published in: Optical Engineering Volume 38, Issue 10
Show Author Affiliations
Hermann Lin, National Sun Yat-Sen Univ. (Taiwan)
Wuu Wen Lin, Chung Shan Institute of Science and Technology (Taiwan)
Mao-Hsiung Chen, National Sun Yat-Sen Univ. (Taiwan)
Shih-Chu Huang, National Sun Yat-Sen Univ. (Taiwan)

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