Fiber-optic Mach-Zehnder interferometric sensor for high-sensitivity high temperature measurement
Fiber-optic Mach-Zehnder interferometric sensor for high-sensitivity high temperature measurement
复制标题
用于高灵敏度高温测量的光纤 MachâZehnder 干涉传感器
DOI：
10.1016/j.optcom.2013.02.054
复制
发表时间：
2013-07-15
影响因子：
2.4
通讯作者：
Pan, Lujun
中科院分区：
文献类型：
--
作者：
Liu, Yun;Peng, Wei;Pan, Lujun
提出了一种用于高灵敏度高温测量的新型光纤马赫-曾德尔干涉（MZI）传感器。光纤MZI使用夹在单模光纤（SMF）和传感锥形SMF之间的一段多模光纤（MMF）来构造。磁动势用于激发传感SMF中的包层模。纤芯模式在锥形区域与传感光纤中的包层模式强烈干涉，在透射光谱中产生对温度敏感的干涉条纹。采用时域有限差分法进行了数值模拟，模拟结果与实验结果吻合较好。一些原型传感器探头的制造和特点。当温度从室温变化到850摄氏度时，我们测量干涉凹陷的波长偏移。具有2cm感测长度的传感器原型在100-400摄氏度的温度范围内表现出85.8pm/摄氏度的灵敏度，并且在400摄氏度至850摄氏度的范围内表现出128.6pm/摄氏度的灵敏度。该传感器可进一步开发为用于恶劣环境应用的紧凑且经济的高温传感器。(C)2013爱思唯尔有限公司版权所有。
We present a novel fiber-optic Mach-Zehnder interferometeric (MZI) sensor for highly-sensitive and high temperature measurement. The fiber-optic MZI is constructed using a piece of multimode fiber (MMF) sandwiched between a single mode fiber (SMF) and a sensing tapered SMF. The MMF is used to excite the cladding modes in the sensing SMF. The core mode interferes strongly with the cladding modes in the sensing fiber at the tapered region, generating interference fringes in the transmission spectrum that are sensitive to temperature. Numerical simulation results using the finite-difference time-domain method agree well with the experimental results. Some prototype sensor probes are fabricated and characterized. We measure the wavelength shift of an interference dip as temperature change from room temperature to 850 degrees C. A sensor prototype with 2 cm sensing length exhibits a sensitivity of 85.8 pm/degrees C in the temperature range of 100-400 degrees C and 128.6 pm/degrees C in the range from 400 degrees C to 850 degrees C. This sensor can be further developed as a compact and economic high-temperature sensor for harsh environment application. (C) 2013 Elsevier B.V. All rights reserved.