175km phase-sensitive OTDR with hybrid distributed amplification

Zinan Wang; Jiajia Zeng; Jin Li; Fei Peng; Li Zhang; Yi Zhou; Han Wu; Yunjiang Rao

doi:10.1117/12.2071255

2 June 2014 175km phase-sensitive OTDR with hybrid distributed amplification

Zinan Wang, Jiajia Zeng, Jin Li, Fei Peng, Li Zhang, Yi Zhou, Han Wu, Yunjiang Rao

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 9157D5 (2014) https://doi.org/10.1117/12.2071255
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

A phase-sensitive optical time-domain reflectometry with 175km sensing range is demonstrated using the combination of co-pumping 2nd-order Raman amplification based on random fiber lasing, counter-pumping 1st-order Raman amplification, and counter-pumping Brillouin amplification. With elaborate arrangements, each pumping scheme is responsible for the signal amplification in one particular segment of the all three. To the best of our knowledge, this is the first time that distributed vibration sensing is performed over such a long distance without inserting repeaters. The novel hybrid amplification scheme demonstrated in this work can also be incorporated in other fiber-optic sensing systems for extension of sensing distance.

Citation Download Citation

Zinan Wang, Jiajia Zeng, Jin Li, Fei Peng, Li Zhang, Yi Zhou, Han Wu, and Yunjiang Rao "175km phase-sensitive OTDR with hybrid distributed amplification", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 9157D5 (2 June 2014); https://doi.org/10.1117/12.2071255

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