Dynamic Quasi-Distributed Ultraweak Fiber Bragg Grating Array Sensing Enabled by Depth-Resolved Dual-Comb Spectroscopy
Dynamic Quasi-Distributed Ultraweak Fiber Bragg Grating Array Sensing Enabled by Depth-Resolved Dual-Comb Spectroscopy
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DOI：
10.1109/tim.2019.2959754
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发表时间：
2020-08
影响因子：
5.6
通讯作者：
Xin Zhao;Jianjun Yang;Jiansheng Liu;Hongfeng Shao;Xinyue Zhang;Qian Li;Zheng Zheng-Zheng
中科院分区：
文献类型：
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作者：
Xin Zhao;Jianjun Yang;Jiansheng Liu;Hongfeng Shao;Xinyue Zhang;Qian Li;Zheng Zheng-Zheng
分布式传感在许多工业应用中起着重要的作用。由相同的超弱光纤布拉格光栅组成的传感器阵列可以通过监测传感器的光谱响应来应用于这样的场景。然而，空间分辨率，采样速度和阵列中支持的传感器数量主要由询问方案决定。虽然双光学频率梳技术已成功地证明是计量学中的一种高分辨率光谱技术，但由于其高度复杂性和成本，在工业传感应用中尚无法实现。它提出并证明了在这里，使一个简单的光纤，双梳状光谱设置组成的光纤激光器没有频率稳定，超弱光纤传感器阵列的询问可以实现。在静态和动态测量中实现了高空间和光谱分辨率以及千赫兹的询问速度。预计我们的深度分辨双梳方案可以在不到1 ms的时间内测量数百个传感器的响应。它也可以灵活地处理距离很近或相距较远的目标。这显示了双梳光谱技术在越来越多的工业应用领域的潜力。
Distributed sensing plays an important role in many industrial applications. Sensor arrays consisting of identical ultraweak fiber Bragg gratings can be applied to such scenarios by monitoring the optical spectral response of the sensors. Yet, the spatial resolution, the sampling speed, and the supported number of sensors in the array are mostly determined by the interrogation scheme. While dual-optical frequency comb techniques had been successfully demonstrated as a high-resolution spectroscopic technique in metrology, it had been beyond the reach of industrial sensing applications because of its high complexity and costs. It is proposed and demonstrated here that, enabled by a simple fiber-optic, dual-comb spectroscopy setup consisting of a fiber laser without frequency stabilization, interrogation of an ultraweak fiber sensor array can be realized. High spatial and spectral resolution as well as kilohertz interrogation speed is achieved in both static and dynamic measurements. It is expected that our depth-resolved dual-comb scheme can measure hundreds of sensors response in less than 1 ms. It is also flexible to deal with targets closely spaced or farther apart from each other. This shows the potential of applying dual-comb spectroscopy to more and more industrial application areas.