Open AccessВлияние дрейфа частоты лазера в фазочувствительной рефлектометрии
Author(s) -
А.А. Жирнов,
К.В. Степанов,
А.О. Чернуцкий,
А.К. Федоров,
Е.Т. Нестеров,
Ч. Звелто,
А.Б. Пнев,
В.Е. Карасик
Publication year - 2019
Publication title -
žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-748X
pISSN - 0044-4642
DOI - 10.21883/os.2019.10.48364.177-19
Subject(s) - reflectometry , optical time domain reflectometer , laser , optics , signal (programming language) , time domain , frequency domain , instability , stability (learning theory) , signal to noise ratio (imaging) , physics , computer science , optical fiber , fiber optic sensor , polarization maintaining optical fiber , machine learning , mechanics , computer vision , programming language
The influence of the laser frequency drift on the operation of phase-sensitive optical time domain reflectometry (φ-OTDR) systems is considered. Theoretical results based on a new numerical φ-OTDR model demonstrating the influence of the laser frequency instability on a signal are reported. This model is verified based on experimental data. It has been used to calculate the signal-to-noise ratio (SNR) of the system for different parameters of the laser source stability. As a result, quantitative requirements for lasers used in φ-OTDR systems are formulated.