High performance Brillouin strain and temperature sensor based on frequency division multiplexing using nonuniform fibers over 75km fiber

Yongkang Dong; Xiaoyi Bao; Liang Chen

doi:10.1117/12.885222

17 May 2011 High performance Brillouin strain and temperature sensor based on frequency division multiplexing using nonuniform fibers over 75km fiber

Yongkang Dong, Xiaoyi Bao, Liang Chen

Author Affiliations +

Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77533H (2011) https://doi.org/10.1117/12.885222
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

Abstract

We report a high-performance 75-km Brillouin optical time-domain analysis (BOTDA) based on frequency-division multiplexing using multi-segment nonuniform fibers, realizing a spatial resolution of 1 m and an accuracy of 1°C/20Νε at the end of 75 km, and a spatial resolution of 0.5 m and an accuracy of 0.7°C/14με; at the end of 50 km. Nonuniform fibers with different Brillouin frequency shifts reduce the effective Brillouin amplification length to one resonant Brillouin frequency segment rather than the entire sensing fiber, and thus the Brillouin interaction can be enhanced in individual segments and signal-to-noise ratio can be improved without the pump pulse depletion or excess amplification on probe pulse.

Citation Download Citation

Yongkang Dong, Xiaoyi Bao, and Liang Chen "High performance Brillouin strain and temperature sensor based on frequency division multiplexing using nonuniform fibers over 75km fiber", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77533H (17 May 2011); https://doi.org/10.1117/12.885222

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