分布式声传感
灵敏度(控制系统)
干涉测量
光纤
光学
传输(电信)
叠加原理
计算机科学
声学
物理
光纤传感器
电信
电子工程
工程类
量子力学
作者
Jianting Li,Bing Chang,Junting Du,Teng Tan,Yong Geng,Heng Zhou,Yupei Liang,Hao Zhang,Guofeng Yan,Lingmei Ma,Zengling Ran,Zinan Wang,Baicheng Yao,Yunjiang Rao
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2024-01-19
卷期号:10 (3)
被引量:6
标识
DOI:10.1126/sciadv.adf8666
摘要
Fiber-optic distributed acoustic sensing (DAS) has proven to be a revolutionary technology for the detection of seismic and acoustic waves with ultralarge scale and ultrahigh sensitivity, and is widely used in oil/gas industry and intrusion monitoring. Nowadays, the single-frequency laser source in DAS becomes one of the bottlenecks limiting its advance. Here, we report a dual-comb–based coherently parallel DAS concept, enabling linear superposition of sensing signals scaling with the comb-line number to result in unprecedented sensitivity enhancement, straightforward fading suppression, and high-power Brillouin-free transmission that can extend the detection distance considerably. Leveraging 10-line comb pairs, a world-class detection limit of 560 fε/√Hz@1 kHz with 5 m spatial resolution is achieved. Such a combination of dual-comb metrology and DAS technology may open an era of extremely sensitive DAS at the fε/√Hz level, leading to the creation of next-generation distributed geophones and sonars.
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