Optimal detection bandwidth for phase-sensitive optical time-domain reflectometry

Xin Lu; Marcelo A. Soto; Luc Thévenaz

doi:10.1117/12.2236944

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30 May 2016 Optimal detection bandwidth for phase-sensitive optical time-domain reflectometry

Xin Lu, Marcelo A. Soto, Luc Thévenaz

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Proceedings Volume 9916, Sixth European Workshop on Optical Fibre Sensors; 99162N (2016) https://doi.org/10.1117/12.2236944
Event: Sixth European Workshop on Optical Fibre Sensors (EWOFS'2016), 2016, Limerick, Ireland

Abstract

The spectrum of the temporal traces obtained from a phase-sensitive optical time-domain reflectometer is theoretically and experimentally analysed, demonstrating its dependence on the incident optical pulse shape. Numerical simulations and theoretical results are validated experimentally, showing a good matching for rectangular optical pulses. The influence of the photodetector bandwidth on the temporal trace quality is also investigated by simulation and experiment. Results show that the photodetector bandwidth needs to be ~ 40 % wider than the pulse spectrum to acquire time-domain traces of the Rayleigh backscattered light with direct detection.

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Xin Lu, Marcelo A. Soto, and Luc Thévenaz "Optimal detection bandwidth for phase-sensitive optical time-domain reflectometry ", Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 99162N (30 May 2016); https://doi.org/10.1117/12.2236944

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