A Miniaturized Optical Fiber Tip High-Temperature Sensor based on Concave-Shaped Fabry-Perot Cavity
A miniaturized optical fiber tip Fabry-Perot interferometer for high-temperature measurement is presented in this paper. The fabrication process of the diaphragm-free Fabry-Perot cavity is quite simple, involving only two steps: fusion splicing and cleaving. By adjusting the arc power during fusion splicing, a concave-shaped structure is obtained, through which the light is coupled/split into the wall of the spliced hollow core fiber. By cleaving the end-face of the hollow core fiber, a concave-shaped diaphragm-free Fabry-Perot interferometer is formed. The temperature response of the sensor was demonstrated, showing a high-temperature tolerance up to 1000 °C and a sensitivity of 0.01226 nm/°C.
C. Zhu and J. Huang, "A Miniaturized Optical Fiber Tip High-Temperature Sensor based on Concave-Shaped Fabry-Perot Cavity," Proceedings of SPIE - The International Society for Optical Engineering, vol. 10982, pp. 519 - 524, SPIE, May 2019.
The definitive version is available at https://doi.org/10.1117/12.2518786
SPIE Defense + Commercial Sensing, 2019 (2019: Apr. 16-18, Baltimore, MD)
Electrical and Computer Engineering
Keywords and Phrases
Extrinsic Fabry-Perot Interferometer; High Temperature; Hollow Core Fiber; Optical Fiber Sensor
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13 May 2019