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Proceedings Paper

Impact of the laser phase noise on chirped-pulse phase-sensitive OTDR
Author(s): Juan Pastor-Graells; María R. Fernández-Ruiz; Hugo F. Martins; Andres Garcia-Ruiz; Sonia Martin-Lopez; Miguel Gonzalez-Herraez
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Paper Abstract

In this work, the impact of the laser phase noise on chirped-pulse phase-sensitive OTDR signals is theoretically and experimentally analyzed. In particular, it is shown that the noise in the readings of strain/temperature changes along the fiber scales directly with the frequency noise power spectral density of the laser. The effect of the pulse chirp on the signal to noise ratio is also investigated. Three lasers with different linewidths (5 MHz, 50 kHz and 25 kHz), i.e., with different phase noise, were used for the experimental study, confirming the validity of the theoretical model.

Paper Details

Date Published: 23 April 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103238T (23 April 2017); doi: 10.1117/12.2266870
Show Author Affiliations
Juan Pastor-Graells, Univ. de Alcalá (Spain)
María R. Fernández-Ruiz, Univ. de Alcalá (Spain)
Hugo F. Martins, FOCUS S. L. (Spain)
Andres Garcia-Ruiz, Univ. de Alcalá (Spain)
Sonia Martin-Lopez, Univ. de Alcalá (Spain)
Miguel Gonzalez-Herraez, Univ. de Alcalá (Spain)

Published in SPIE Proceedings Vol. 10323:
25th International Conference on Optical Fiber Sensors
Youngjoo Chung; Wei Jin; Byoungho Lee; John Canning; Kentaro Nakamura; Libo Yuan, Editor(s)

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