12-km distributed fiber sensor based on differential pulse-width pair BOTDA

Yongkang Dong; Xiaoyi Bao; Wenhai Li

doi:10.1117/12.834919

5 October 2009 12-km distributed fiber sensor based on differential pulse-width pair BOTDA

Yongkang Dong, Xiaoyi Bao, Wenhai Li

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75032G (2009) https://doi.org/10.1117/12.834919
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

We demonstrate a 12-km differential pulse-width pair BOTDA using 40/50 ns pulses with DC-coupled detection. A spatial resolution of 1 m and a narrowband Brillouin gain spectrum of 33 MHz are obtained simultaneously compared with 88 MHz for 10 ns pulse. The experimental results also show that the differential Brillouin gain is improved by 6.8 times over direct Brillouin gain of 10 ns pulse, and temperature uncertainty for 40/50 ns pulses is 0.25 °C and while for 10 ns pulse is 1.8 °C.

Citation Download Citation

Yongkang Dong, Xiaoyi Bao, and Wenhai Li "12-km distributed fiber sensor based on differential pulse-width pair BOTDA", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75032G (5 October 2009); https://doi.org/10.1117/12.834919

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