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Long-range distributed temperature sensing with sub-meter scale spatial resolution based on BOTDA employing pre-pumped Golay coding
Author(s): Qiao Sun; Shilin Sun; Jianfei Wang; Zhou Meng
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Paper Abstract

The BGS broadening caused by short pump pulse would degrade the SNR enhancement provided by the optical pulse coding and strongly reduce the measurement accuracy of coded BOTDA sensors, especially at long sensing ranges with sub-meter spatial resolution. In this work, to overcome this trade-off between spatial resolution and measurement accuracy, we implement a BOTDA sensor employing pre-pumped Golay coding with optimized pre-pumped pulse power. The proposed scheme fully exploits the SNR enhancement provided by the coding and the benefits from the preactivated acoustic field established by the pre-pumped pulse, achieving distributed temperature measurements with 70 cm spatial resolution and temperature resolution better than 1.5 °C throughout the 50 km sensing fiber.

Paper Details

Date Published: 23 April 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 1032386 (23 April 2017); doi: 10.1117/12.2265481
Show Author Affiliations
Qiao Sun, National Univ. of Defense Technology (China)
Shilin Sun, National Univ. of Defense Technology (China)
Jianfei Wang, National Univ. of Defense Technology (China)
Zhou Meng, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 10323:
25th International Conference on Optical Fiber Sensors
Youngjoo Chung; Wei Jin; Byoungho Lee; John Canning; Kentaro Nakamura; Libo Yuan, Editor(s)

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