Distributed measurements of vibration frequency using phase-OTDR with a DFB laser self-stabilized through PM fiber ring cavity

J.l. Bueno Escobedo, J. Jason, C.a. López-mercado, V.v. Spirin, M. Wuilpart, P. Mégret, D.a. Korobko, I.o. Zolotovskiy, A.a. Fotiadi

Research output: Contribution to journalArticle

Abstract

We have evaluated the performance of a phase-sensitive optical time domain reflectometry (φ-OTDR) system for vibration measurements utilizing a conventional telecom DFB laser self-stabilized through an external PM optical fiber ring resonator. This low-cost solution is directly compared with the use of a commercial, ultra-narrow linewidth (∼100 Hz) fiber laser implemented into the same setup. Both systems are tested for measurement of the frequency of vibration applied to a fiber at a distance of 3500 m. The obtained SNR value higher than 6 dB demonstrates the ability of the DFB laser to perform distributed measurements of vibrations with frequencies up to 5600 Hz with a spatial resolution of 10 m.
Original languageEnglish
Pages (from-to)1840-1842
Number of pages3
JournalResults in Physics
Volume12
Early online date10 Feb 2019
DOIs
Publication statusPublished - 1 Mar 2019

Bibliographical note

© 2019 Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license
(http://creativecommons.org/licenses/BY-NC-ND/4.0/).

Keywords

  • Frequency examination
  • Phase-sensitive OTDR
  • Self-injection locking

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