Influence of the Laser Frequency Drift in Phase-Sensitive Optical Time Domain Reflectometry
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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.
Keywords:phase-sensitive optical time domain reflectometer laser frequency fluctuation narrow-band laser distributed sensor
A theoretical and experimental study of the stability of a laser source was performed by A.A. Zhirnov and K.V. Stepanov and funded by the Russian Foundation for Basic Research, project no. 18-32-00688. A.K. Fedorov was funded by the Russian Foundation for Basic Research, project no. 18-37-20033.
CONFLICT OF INTEREST
The authors declare that they have no conflict of interest.
- 2.H. F. Taylor and C. E. Lee, US Patent No. 5194847 (1993).Google Scholar
- 10.E. T. Nesterov, A. A. Zhirnov, K. V. Stepanov, A. B. Pnev, V. E. Karasik, Ya. A. Tezadov, E. V. Kondrashin, and A. B. Ushakov, J. Phys.: Conf. Ser. 584, 012028 (2015).Google Scholar
- 20.A. B. Pnev, A. A. Zhirnov, K. V. Stepanov, E. T. Nesterov, D. A. Shelestov, and V. E. Karasik, J. Phys.: Conf. Ser. 584, 012016 (2015).Google Scholar
- 21.J. W. Goodman, Statistical Optics (Wiley-Interscience, New York, 1985).Google Scholar