14 October 2009 High spatial resolution and long-distance BOTDA using differential Brillouin gain in a dispersion shifted fiber
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Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 750384 (2009) https://doi.org/10.1117/12.848676
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom
Abstract
In a long-distance Brillouin sensing system, modulation instability (MI) effect could deplete the probe pulse at a high pulse power in a standard single-mode fiber, which decreases the Brillouin gain and signal-to-noise ratio, and thus limits the spatial resolution and sensing length. In this paper, a dispersion shifted fiber with normal dispersion is used to avoid the MI effect; a spatial resolution of 0.5 m is realized using differential Brillouin gain in a 25-km dispersion shifted fiber, to the best of our knowledge, which is the best value in such a length.
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Yongkang Dong, Yongkang Dong, Xiaoyi Bao, Xiaoyi Bao, } "High spatial resolution and long-distance BOTDA using differential Brillouin gain in a dispersion shifted fiber", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 750384 (14 October 2009); doi: 10.1117/12.848676; https://doi.org/10.1117/12.848676
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