Chen Zhenshi, Xiong Songsong, Gao Shecheng, Zhang Hui, Wan Lei, Huang Xincheng, Huang Bingsen, Feng Yuanhua, Liu Weiping, Li Zhaohui
Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou 510632, China.
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China.
Sensors (Basel). 2018 Jan 12;18(1):202. doi: 10.3390/s18010202.
A miniaturized tip Fabry-Perot interferometer (tip-FPI) is proposed for high-temperature sensing. It is simply fabricated for the first time by splicing a short length of microfiber (MF) to the cleaved end of a standard single mode fiber (SMF) with precise control of the relative cross section position. Such a MF acts as a Fabry-Perot (FP) cavity and serves as a tip sensor. A change in temperature modifies the length and refractive index of the FP cavity, and then a corresponding change in the reflected interference spectrum can be observed. High temperatures of up to 1000 °C are measured in the experiments, and a high sensitivity of 13.6 pm/°C is achieved. This compact sensor, with tip diameter and length both of tens of microns, is suitable for localized detection, especially in harsh environments.
提出了一种用于高温传感的小型化尖端法布里-珀罗干涉仪（尖端FPI）。通过将一小段微光纤（MF）精确控制相对横截面位置地拼接至标准单模光纤（SMF）的切割端，首次简单地制造出了这种干涉仪。这样的微光纤充当法布里-珀罗（FP）腔并用作尖端传感器。温度变化会改变FP腔的长度和折射率，进而可以观察到反射干涉光谱的相应变化。实验中测量了高达1000℃的高温，并实现了13.6 pm/℃的高灵敏度。这种紧凑的传感器，尖端直径和长度均为几十微米，适用于局部检测，尤其是在恶劣环境中。
