Temperature sensor based on liquid-filled negative curvature optical fibers
Temperature sensor based on liquid-filled negative curvature optical fibers
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DOI：
10.1364/osac.2.002123
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发表时间：
2019-07-15
期刊：
影响因子：
1.6
通讯作者：
Hu, Jonathan
中科院分区：
文献类型：
--
作者：
Wei, Chengli;Young, Joshua T.;Hu, Jonathan
我们计算研究了一种新型的温度传感器，使用液体填充负曲率光纤。芯管和包层管都渗透有具有温度敏感折射率的液体。高损耗谐振波长对液体折射率的变化敏感。随着温度的升高，液体的折射率减小，谐振波长增大。使用填充有折射率为1.36的液体的负曲率光纤，当温度从15 ℃变化到35 ℃时，温度灵敏度为1.1 nm/℃。当使用折射率从1.30到1.42的不同液体时，温度灵敏度从0.82 nm/℃上升到2.48 nm/℃，并且我们在光纤中使用第三谐振峰。利用第二个谐振峰可以使温度灵敏度提高38%。推导了温度灵敏度的解析公式，该公式可以准确地预测该传感器的温度灵敏度。空气芯和包层管的相对大的尺寸（大约10 μ m）与具有较小孔的其它光子晶体光纤相比，应当使得渗透过程更容易。利用基于充液负曲率光纤的温度传感器，不需要任何特殊的后处理，例如对选定的空气孔进行充液或光纤光栅的刻写。(C)根据OSA开放获取出版协议的条款，2019年美国光学学会
We computationally investigate a novel temperature sensor that uses liquid-filled negative curvature optical fibers. Both the core and cladding tubes are infiltrated with a liquid that has a temperature-sensitive refractive index. The high-loss resonant wavelengths are sensitive to the liquid's change of the refractive index. The refractive index of the liquid decreases and the resonant wavelengths increase when the temperature increases. The temperature sensitivity is 1.1 nm/degrees C as the temperature changes from 15 degrees C to 35 degrees C using negative curvature optical fibers that are filled with liquid that has a refractive index of 1.36. The temperature sensitivity rises from 0.82 nm/degrees C to 2.48 nm/degrees C when different liquids are used with a refractive index from 1.30 to 1.42, and we use the third resonant peak in the fiber. The temperature sensitivity can be increased by 38% by using the second resonant peak. An analytical formula for the temperature sensitivity is derived, which can give an accurate prediction for the temperature sensitivity of this sensor. The relatively large size of the air core and cladding tubes, on the order of 10 mu m, should make the infiltration procedure easier compared to other photonic crystal fibers with smaller holes. With temperature sensors based on liquid-filled negative curvature optical fibers, there is no need for any special post-processing, such as the liquid filling of selected air holes or inscription of fiber gratings. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement