100km sensing range Brillouin optical time domain analysis based on time-division multiplexing

Yongkang Dong; Xiaoyi Bao; Liang Chen

doi:10.1117/12.885224

17 May 2011 100-km sensing range Brillouin optical time domain analysis based on time-division multiplexing

Yongkang Dong, Xiaoyi Bao, Liang Chen

Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 775308 (2011) https://doi.org/10.1117/12.885224
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

Abstract

We propose and demonstrate a novel high-performance 100-km range Brillouin optical time-domain analysis (BOTDA) based on time-division multiplexing. To avoid the limitation of pump depletion or excess amplification in a conventional long-range BOTDA, in our scheme instead of a pulse and a CW wave but two pulses, i. e., a probe pulse and a pump pulse are used to perform the measurement. The delay between the probe and pump pulses can be changed to select the sensing section where the probe pulse interacts with the pump pulse. The measurement of the entire sensing fiber is realized by implementing the measurement for each sensing section through changing the delay between the two pulses. In experiment, a 100-km sensing fiber is divided into 11 sections based on gain-controlled principle, and a spatial resolution of 0.6 m and 2 m are obtained at the end of 75 km and 100 km, respectively.

Citation Download Citation

Yongkang Dong, Xiaoyi Bao, and Liang Chen "100-km sensing range Brillouin optical time domain analysis based on time-division multiplexing", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 775308 (17 May 2011); https://doi.org/10.1117/12.885224

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