17 May 2011 Measurement range elongation based on a temporal gating scheme in Brillouin correlation domain distributed discrimination system for strain and temperature operated by a single laser
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Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77530A (2011) https://doi.org/10.1117/12.885077
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada
Abstract
We have demonstrated distributed discrimination of strain and temperature by localizing and scanning both the Stimulated Brillouin scattering (SBS) and the Brillouin dynamic grating (BDG) along a polarization maintaining fiber, with elongated measurement range. The localization and scanning is performed by a correlation domain technique, whose measurement range is restricted by the distance between consecutive correlation peaks. To overcome this restriction, we applied a temporal gating scheme to the system, enlarging the measurement range from ~8 m to ~500 m. Here, we report the results confirming the effectiveness of this scheme in a system operated by a single laser source and demonstrate strain-temperature discrimination when strain or temperature is applied to segments on the 500-m-long fiber under test.
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Rodrigo Kendy Yamashita, Weiwen Zou, Zuyuan He, Kazuo Hotate, "Measurement range elongation based on a temporal gating scheme in Brillouin correlation domain distributed discrimination system for strain and temperature operated by a single laser", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77530A (17 May 2011); doi: 10.1117/12.885077; https://doi.org/10.1117/12.885077
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