D. A. Krivosheina, A. Yu. Tkachenko, I. A. Lobach, S. I. Kablukov, “Coherent optical frequency reflectometer based on a self-scanning fibre laser for distributed measurements”, Kvantovaya Elektronika, 2022, Volume 52, Number 11,Pages <nobr>994

This article is cited in 1 paper

Selection of papers presented at the International Workshop on Fibre Lasers (Novosibirsk, 15-19 August 2022) (Compiled and edited by S.L. Semjonov and S.A. Babin)

Coherent optical frequency reflectometer based on a self-scanning fibre laser for distributed measurements

D. A. Krivosheina^ab, A. Yu. Tkachenko^a, I. A. Lobach^a, S. I. Kablukov^ac

^a Institute of Automation and Electrometry, Siberian Branch of Russian Academy of Sciences, Novosibirsk
^b Novosibirsk State Technical University
^c Novosibirsk State University

Abstract: We report the possibility of measuring the temperature distribution along a conventional single-mode fibre by coherent optical frequency reflectometry using a self-scanning fibre laser and Rayleigh scattering of light by inhomogeneities frozen into the fibre. To this end, the problem of increasing the sensitivity of the reflectometer to a level of about –120 dB·mm^–1 is solved. A linear relationship is shown between a change in fibre temperature and a shift in the reflection spectrum of a heated fibre section 4 cm long with a sensitivity of ∼2 GHz·C°^{–1^{.

Keywords:
optical reflectometry, optical fibre, fibre laser, Rayleigh light scattering.

Received: 16.09.2022}}