23 April 2017 20 dB SNR enhancement in phase-sensitive OTDR using pulse stretching and recompression
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Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103230R (2017) https://doi.org/10.1117/12.2265605
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of
Abstract
This work shows the possibility of using chirped pulse amplification concepts in order to increase the signal-to-noise ratio (SNR) of phase sensitive optical time domain reflectometry (ΦOTDR) sensors. This method allows to increase the SNR of a ΦOTDR sensor without sacrificing spatial resolution. Here, we report a ΦOTDR sensor with a spatial resolution of 3 mm (limited only by the available detection equipment) and an SNR increase of 20 dB over the traditional architecture. To our knowledge, this is the highest-resolution ΦOTDR sensor reported to date.
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Juan Pastor-Graells, Luis Romero Cortés, Hugo F. Martins, María R. Fernández-Ruiz, José Azaña, Sonia Martin-Lopez, Miguel Gonzalez-Herraez, "20 dB SNR enhancement in phase-sensitive OTDR using pulse stretching and recompression", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103230R (23 April 2017); doi: 10.1117/12.2265605; https://doi.org/10.1117/12.2265605
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