干涉测量
马赫-曾德尔干涉仪
材料科学
折射率
光学
光纤
熔接
光纤传感器
偏移量(计算机科学)
芯(光纤)
毛细管作用
光电子学
物理
计算机科学
复合材料
程序设计语言
作者
Shuai Gao,Chongke Ji,Qiu-Yi Ning,Weicheng Chen,Jianqing Li
标识
DOI:10.1016/j.yofte.2020.102202
摘要
We demonstrated a high-sensitive Mach-Zehnder interferometric temperature fiber-optic sensor based on core-offset splicing technique by filling the interferometer with refractive index matching liquid. The fiber-optic interferometer was constructed of a section of quartz capillary sandwiched by two core-offset spliced optical fibers, and its sensitivities to external refractive index and temperature were −17335 nm/RIU and 32 pm/°C, respectively. When the quartz capillary of the interferometer was filled with the above liquid, the sensor was highly sensitive to temperature due to the thermo-optic effect. A sensitivity of 21.2 nm/°C which is 660 times in magnitude of the unfilled Mach-Zehnder interferometer was achieved. The proposed sensor’s excellent compactness, simple fabrication process and high sensitivity will be their advantages of future applications in security fields, industrial areas and biomedical detection.
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