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arXiv · 1604.08854

Influence of the laser frequency drift in phase-sensitive optical time-domain reflectometry

A. A. Zhirnov·K. V. Stepanov·A. O. Chernutsky·A. K. Fedorov·E. T. Nesterov·C. Svelto·A. B. Pnev·V. E. Karasik
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Abstract

The influence of the laser frequency drift on the operation of phase-sensitive optical time-domain reflectometry ($\Phi$-OTDR) systems is considered. Theoretical results based on a new numerical $\Phi$-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 $\Phi$-OTDR systems are formulated.

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A. A. Zhirnov, K. V. Stepanov, A. O. Chernutsky, A. K. Fedorov, E. T. Nesterov, C. Svelto, A. B. Pnev, V. E. Karasik. 2016-04-28. Influence of the laser frequency drift in phase-sensitive optical time-domain reflectometry. https://doi.org/10.1134/s0030400x1910031x

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