14 October 2009 Time-domain distributed sensor with 1 cm spatial resolution based on Brillouin dynamic gratings
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Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75037V (2009) https://doi.org/10.1117/12.848548
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom
Abstract
We propose and experimentally demonstrate the highest-resolution BOTDA system ever reported using Brillouin dynamic grating in a polarization-maintaining fiber (PMF). Acoustic waves containing the information of local Brillouin frequency are generated by a long pump pulse in one polarization, and read out by a short probe pulse in the orthogonal polarization at a clearly distinct optical frequency from the pump. In the experiment, a distributed strain measurement with 1 cm spatial resolution is performed over a 20 m fiber.
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Kwang-Yong Song, Sanghoon Chin, Nikolay Primerov, Luc Thevenaz, "Time-domain distributed sensor with 1 cm spatial resolution based on Brillouin dynamic gratings", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75037V (14 October 2009); doi: 10.1117/12.848548; https://doi.org/10.1117/12.848548
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