This article is cited in 27 papers

Selection of reports presented at the 7th All-Russian Conference on Fiber Optics (8-11 October 2019, Perm) (edited compiled by S.L.Semjonov)

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

A. Yu. Tkachenko^a, I. A. Lobach^ab, S. I. Kablukov<sup>ab

a</sup> Institute of Automation and Electrometry, Siberian Branch of Russian Academy of Sciences, Novosibirsk
^b Novosibirsk State University

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.

Keywords: coherent optical frequency-domain reflectometer, selfscanning fibre laser, tunable laser, fibre sensor, reflectometry.

Received: 21.10.2019

 English version: Quantum Electronics, 2019, 49:12, 1121–1126

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