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High-efficiency DBA-BOTDA with optimized SNR by multiple bandwidths pump modulation

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Abstract

For Brillouin optical time-domain analysis (BOTDA) based on distributed Brillouin amplification (DBA), constant Brillouin response achieved by the exponentially variable bandwidth/intensity pump modulation suffers from the much lower pumping efficiency for long-range sensing, which counterbalances the merit of DBA. In this Letter, pump modulation by multiple constant bandwidths was proposed and demonstrated. The ~98.9 km sensing with ~5 m spatial resolution and no use of optical pulse coding (OPC) was achieved by ~8 dBm Brillouin pump, which is lower by ~9 dB in theory by comparison with exponentially increased bandwidth modulation. Compared with traditional DBA-BOTDA, signal-to-noise ratio (SNR) enhancement with >4.6 dB was obtained. The flattened standard deviation (STD) of Brillouin frequency shift (BFS) (less than ~2 MHz) along the whole fiber was demonstrated.

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DOI:10.3788/col201917.010603

所属栏目:Fiber optics and optical communication

基金项目:This work was supported by the National Natural Science Foundation of China (NSFC) (No. 61205079) and the Scientific Research Fund of Sichuan Provincial Education Department (No. 18ZA0401). The authors thank Dr. Javier Urricelqui, Dr. Juan José Mompó, and Prof. Alayn Loayssa at the Universidad Pública de Navarra for providing the data from Refs. [14,16].

收稿日期:2018-09-18

录用日期:2018-11-12

网络出版日期:2018-12-20

作者单位    点击查看

Huiliang Ma:College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610101, China
Xinhong Jia:College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610101, China
Kai Lin:College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610101, China
Cong Xu:College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610101, China

联系人作者:Xinhong Jia(jiaxh_0@126.com)

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引用该论文

Huiliang Ma, Xinhong Jia, Kai Lin, Cong Xu, "High-efficiency DBA-BOTDA with optimized SNR by multiple bandwidths pump modulation," Chinese Optics Letters 17(1), 010603 (2019)

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