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Proceedings Paper

A phase-sensitive optical time-domain reflectometry system with an electrical I/Q demodulator
Author(s): Guojie Tu; Benli Yu; Mengmeng Zhao; Jiping Lin
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Paper Abstract

We propose an electrical I/Q demodulation scheme to decrease the sampling rate and computational cost in coherent phase-sensitive Optical Time-Domain Reflectometry systems. The IF signal from the photon detector and the local-oscillator from the acoustic-optic modulator driver are splited into two parts, respectively. One of local-oscillators is 90°shifted, then the signals and LOs are cross-mixed and the outputs are low-pass filtered to obtain the I/Q signal. Besides of the save of computational cost, the sampling rate and data storage is reduced at least 1.6 times. At last, a quantitative measurement of a 50 Hz vibration is successfully demonstrated in the experiment.

Paper Details

Date Published: 23 October 2018
PDF: 7 pages
Proc. SPIE 10821, Advanced Sensor Systems and Applications VIII, 1082123 (23 October 2018); doi: 10.1117/12.2502689
Show Author Affiliations
Guojie Tu, Anhui Univ. (China)
Benli Yu, Anhui Univ. (China)
Mengmeng Zhao, Anhui Univ. (China)
Jiping Lin, Anhui Univ. (China)

Published in SPIE Proceedings Vol. 10821:
Advanced Sensor Systems and Applications VIII
Tiegen Liu; Shibin Jiang, Editor(s)

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