Acta Optica Sinica, Volume. 41, Issue 7, 0706003(2021)
Distributed Acoustic Sensing Based on Multi-Core Fiber
In this study, we use multiple independent parallel spatial channels in multi-core fibers to achieve spatial diversity in solving the signal fading and limited signal-to-noise ratio of distributed fiber acoustic sensing systems based on traditional single-mode fibers. We use the fan-in and fan-out modules for independent transmission and centralized reception of signals in four cores of the multi-core fiber, and multiple signals can be aggregated effectively using a coherent aggregation method. The experimental results show a well-reconstructed external disturbance signal, suppressed signal fading, and reduced noise floor by 5.2 dB compared with that of the optimized single-mode fiber system. The sensor exhibits high-level performance: lowest noise floor of -85 dB and bandwidth of 10 kHz.
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Jinfeng Gu, Bin Lu, Junqi Yang, Zhaoyong Wang, Lei Ye, Qing Ye, Ronghui Qu, Haiwen Cai. Distributed Acoustic Sensing Based on Multi-Core Fiber[J]. Acta Optica Sinica, 2021, 41(7): 0706003
Category: Fiber Optics and Optical Communications
Received: Oct. 13, 2020
Accepted: Nov. 23, 2020
Published Online: Apr. 11, 2021
The Author Email: Lu Bin (lubin@siom.ac.cn), Cai Haiwen (hwcai@siom.sc.cn)