Abstract
A novel high-sensitivity temperature sensor based on a chirped thin-core fiber Bragg grating Fabry–Perot interferometer (CTFBG-FPI) and the Vernier effect is proposed and demonstrated. With femtosecond laser direct writing technology, two CTFBG-FPIs with different interferometric cavity lengths are inscribed inside a thin-core fiber to form a Vernier effect system. The two FPIs consist of two pairs of CTFBGs with a full width at half maximum (FWHM) of 66.5 nm staggered in parallel. The interferometric cavity lengths of the two FPIs were designed to be 2 mm and 1.98 mm as the reference arm and sensing arm of the sensor, respectively. The temperature sensitivity of this sensor was measured to be −1.084 nm/°C in a range of 40–90°C. This sensor is expected to play a crucial role in precision temperature measurement applications.
© 2023 Optica Publishing Group
Full Article | PDF ArticleCorrections
27 July 2023: A typographical correction was made to the funding section.
More Like This
Jiao Song, Simei Sun, Chao Jiang, Ning Chen, Wenbo Jiang, Changning Liu, Jie Ren, and Saiyu Wang
Opt. Lett. 48(7) 1674-1677 (2023)
Simiao Duan, Shengli Pu, Xin Lin, Weinan Liu, Zijian Hao, Chencheng Zhang, Jiaqi Fu, and Shufei Han
Opt. Express 32(1) 275-286 (2024)
Zenghui Wang, Shaocui Jiang, Peng Yang, Wenxi Wei, Wangge Bao, and Baojin Peng
Opt. Express 31(5) 7073-7089 (2023)