Abstract

Single-crystal sapphire fibers have a very high melting point (up to 2050°C), which renders them a very good candidate for the sensing applications at a very high temperature. We present in this paper the recent work of developing single-crystal sapphire fiber extrinsic Fabry-Pérot interferometric strain sensors based on the whitelight interferometric spectrum demodulation technique. Prototype sapphire strain sensors were fabricated and tested at high temperatures up to 1004°C . The preliminary experimental results indicate that the sensors are promising to be used under high-temperature environments for making strain measurements with the strain measurement resolution of 0.2-µ strain.

© 2003 IEEE

High-temperature strain sensor based on sapphire fiber Bragg grating

Jun He, Zhuoda Li, Xizhen Xu, Qingming Tan, Xiaoyu Weng, Liwei Liu, Junle Qu, Changrui Liao, and Yiping Wang
Opt. Lett. 49(3) 446-449 (2024)

Sapphire optical fiber high-temperature vibration sensor

Yang Cui, Yi Jiang, Yutong Zhang, Xinxing Feng, Jie Hu, and Lan Jiang
Opt. Express 30(2) 1056-1065 (2022)

Sapphire-fiber-based white-light interferometric sensor for high-temperature measurements

Yizheng Zhu, Zhengyu Huang, Fabin Shen, and Anbo Wang
Opt. Lett. 30(7) 711-713 (2005)

Fiber-optic Fabry–Perot pressure sensor based on sapphire direct bonding for high-temperature applications

Wangwang Li, Ting Liang, Pinggang Jia, Cheng Lei, Yingping Hong, Yongwei Li, Zong Yao, Wenyi Liu, and Jijun Xiong
Appl. Opt. 58(7) 1662-1666 (2019)

Hybrid LPFG/MEFPI sensor for simultaneous measurement of high-temperature and strain

Yun-Jiang Rao, Zeng-Ling Ran, Xian Liao, and Hong-You Deng
Opt. Express 15(22) 14936-14941 (2007)