Abstract

In this paper, an annular winding structure made of single-mode optical fiber is proposed as the core of a cost-efficient and reliable annular optical fiber temperature sensor (AOFTS). The sensor is mainly due to the multi-mode interference effect to achieve real-time response to external temperature changes. The experimental results show that the average temperature sensitivity of the sensor is about 255.5 pm/°C in the temperature range of ${-}{{20}}^\circ {\rm C} - {{110}}^\circ {\rm C}$; it has higher sensitivity at low temperatures. At ${-}{{20}}^\circ {\rm C}$, the sensitivity of the AOFTS reaches 450 pm/°C. The sensor has the advantages of simple fabrication, low fabrication cost, strong stability, and good reproducibility and repeatability. It has great application prospects in the field of low-temperature detection.

© 2022 Optica Publishing Group

Ring core few-mode fiber sensor for curvature measurement

Fan Zhang, Baijin Su, Lixi Zhong, Beibei Qi, Ou Xu, and Yuwen Qin
Appl. Opt. 61(10) 2598-2603 (2022)

Fiber optic temperature and strain sensor using dual Mach–Zehnder interferometers

Yousong Li, Yichao Jiang, Nan Tang, Guanling Wang, Jiali Tao, Gang Zhang, Qiang Ge, Ningjuan Zhang, and Xuqiang Wu
Appl. Opt. 62(8) 1977-1983 (2023)

Optical Vernier sensor based on a cascaded tapered thin-core microfiber for highly sensitive refractive index sensing

Huiji Chen, Binbin Luo, Decao Wu, Xiangwen Yang, Shenghui Shi, Xue Zou, Yujie Li, Shanghai Jiang, and Mingfu Zhao
Appl. Opt. 61(36) 10727-10734 (2022)

Highly sensitive RI and temperature sensor based on an asymmetric fiber coupler

Yufang Chen, Hongdan Wan, Hongqiang Chang, Xueying Lin, and Fangren Hu
Appl. Opt. 61(14) 4063-4067 (2022)

Highly sensitive temperature and refractive index sensor based on no-core fiber cascaded with a balloon-shaped bent single-mode fiber

Xiaojun Zhu, Mengqiang Song, Xing Liu, Wen Liu, Yongquan Pan, Juan Cao, Guoan Zhang, Yongjie Yang, Yuechun Shi, and Wuming Wu
Appl. Opt. 62(35) 9266-9273 (2023)