26 January 2016 Influences of pulse on the performance of phase-sensitivity OTDR
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Proceedings Volume 9903, Seventh International Symposium on Precision Mechanical Measurements; 99031Z (2016) https://doi.org/10.1117/12.2214272
Event: Seventh International Symposium on Precision Mechanical Measurements, 2015, Xia'men, China
Abstract
The influences of pulse, including the pulse width Tp and the peak pulse power Ipeak, on phase-sensitivity optical time domain reflectometer (φ-OTDR) based distributed vibration sensor are investigated in this paper. A numerical simulation is performed to illustrate the relationships between pulse and fluctuations ratio coefficient (FRC) as well as visibility of interferential Rayleigh backscattering light. The simulation results show that the method of amplifying Ipeak is benefit for increasing the FRC induced by vibration, while it is useless for improving the visibility. In contrast, the method of broadening Tp is useful for increasing the FRC by improving the visibility. Laboratory experiments are implemented by using the φ-OTDR prototype with an electro-dynamic vibration table producing stable vibration signals. The good agreement of experimental with simulated results validates the theoretical analysis.
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Chunxi Zhang, Chunxi Zhang, Xiang Zhong, Xiang Zhong, Lijing Li, Lijing Li, "Influences of pulse on the performance of phase-sensitivity OTDR", Proc. SPIE 9903, Seventh International Symposium on Precision Mechanical Measurements, 99031Z (26 January 2016); doi: 10.1117/12.2214272; https://doi.org/10.1117/12.2214272
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