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6 September 2013 Two-beam phase-sensitive optical time domain reflectometer based on Jones matrix modeling
Yang An, Xin Feng, Jian Li, Hao Feng, Shijiu Jin
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Optical Engineering, Vol. 52, Issue 9, 094102 (September 2013). https://doi.org/10.1117/1.OE.52.9.094102
Abstract
A two-beam phase-sensitive optical time domain reflectometer (OTDR) is proposed and experimentally demonstrated. Optical pulses are launched into two distributed fibers. With the interference effect of two channel Rayleigh scattering signals and the positioning principle of the traditional OTDR, detection and location of vibration events along sensing fibers can be achieved using a new signal processing scheme. What is more, to investigate the sensitivity fading problem that often occurred when polarization controller (PC) is not utilized, the optical polarization model based on the equivalent Jones matrices of sensing fibers is established. Simulation results show that due to the polarization characteristic discrepancy of the sensing fibers, the signal amplitude varies a lot for different polarization states of the incident light. Experimental result shows that with the PC, the signal signal to noise ratio can be stabilized as 9.5 dB, which verifies the effectiveness of the sensor.
CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
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Yang An, Xin Feng, Jian Li, Hao Feng, and Shijiu Jin "Two-beam phase-sensitive optical time domain reflectometer based on Jones matrix modeling," Optical Engineering 52(9), 094102 (6 September 2013). https://doi.org/10.1117/1.OE.52.9.094102
Published: 6 September 2013
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Cited by 18 scholarly publications.
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KEYWORDS
Optical fibers
Polarization
Signal to noise ratio
Reflectometry
Signal detection
Signal processing
Jones matrices
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