Coherent optical frequency-domain reflectometer based on a fibre laser with frequency self-scanning

A. Yu Tkachenko, I. A. Lobach, S. Kablukov

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Abstract

The first results of an experimental study of a coherent optical frequency-domain reflectometer (C-OFDR) based on a simple single-frequency fibre laser with frequency self-scanning are presented. The self-scanning laser generates microsecond pulses, and its lasing frequency changes linearly with a change in the pulse number without using any actively tuned elements. In addition, the generation of each pulse occurs on only one longitudinal mode with a linewidth less than 1 MHz. This laser is characterised by a high linearity of frequency tuning, due to which reflectograms can be measured without any additional spectral correction. The C-OFDR demonstrates a possibility of attaining a spatial sampling of ∼200 μm and a reflectance sensitivity of approximately down to-80 dB at a test line length of ∼9 m.

Original languageEnglish
Article number1121
Pages (from-to)1121-1126
Number of pages6
JournalQuantum Electronics
Volume49
Issue number12
DOIs
Publication statusPublished - 21 Oct 2019
Event7th All-Russian Conference on Fiber Optics - Perm
Duration: 8 Oct 201911 Oct 2019

Keywords

  • coherent optical frequency-domain reflectometer
  • self-scanning fibre laser
  • tunable laser
  • fibre sensor
  • reflectometry
  • CODES
  • selfscanning fibre laser

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