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Paper detail

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

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.

preprint2020arXivOpen access
A. A. ZhirnovK. V. StepanovA. O. ChernutskyA. K. FedorovE. T. NesterovC. SveltoA. B. PnevV. E. Karasik
physics.ins-detphysics.opticsphysics.data-an
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A. A. ZhirnovK. V. StepanovA. O. ChernutskyA. K. FedorovE. T. NesterovC. SveltoA. B. PnevV. E. Karasik

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