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Liquid-Crystal-Filled Side-hole Fiber for High-Sensitivity Temperature and Electric Field Measurement

机译：液晶填充侧孔光纤用于高灵敏度温度和电场测量

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摘要

We propose a highly sensitive sensor based on a nematic liquid-crystal-filled side-hole fiber. The liquid crystal is precisely filled into an air hole of the optical fiber using a method of manually gluing in the fusion splicer. Due to the coupling between the liquid crystal waveguide and the fiber core, multiple response dips appear in the transmission spectrum of the device. When an external temperature or electric field variation is applied to the liquid crystal and its refractive index changes, the transmission spectrum of this device will shift accordingly. Temperature and electric field response tests were performed on the device in the experiment, and the obtained temperature and electric field sensitivities were as high as −1.5 nm/°C and 3.88 nm/V , respectively. For the exhibited advantages of being easy to manufacture, low cost, and high sensitivity, the proposed sensor is very promising for actual application in temperature or weak electric field monitoring.
机译：我们提出了一种基于向列液晶填充的侧孔光纤的高灵敏度传感器。使用手动熔接在熔接机中的方法将液晶精确地填充到光纤的气孔中。由于液晶波导和光纤纤芯之间的耦合，在设备的传输光谱中会出现多个响应骤降。当外部温度或电场变化施加到液晶上并且其折射率发生变化时，该器件的透射光谱将相应地移动。实验中对该器件进行了温度和电场响应测试，获得的温度和电场灵敏度分别高达-1.5 nm /°C和3.88 nm / V。由于具有易于制造，成本低和灵敏度高的优点，因此所提出的传感器对于在温度或弱电场监测中的实际应用非常有前途。

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