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Updated: Jun 18, 2026
A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
Published on: January 7, 2019
Miniature fiber-optic temperature sensors based on silica/polymer microfiber knot resonators
Yu Wu1, Yun-Jiang Rao, Yi-Huai Chen
1Key Lab of Broadband Optical Fiber Transmission & Communication Networks Technology (Education Ministry of China), University of Electronic Science & Technology of China, Chengdu, Sichuan 610054, China.
Abstract:
In this paper, we report two fiber-optic temperature sensors based on silica/polymer microfiber knot resonators (SMKR/PMKR). The structures of these sensors are composed of three layers, MgF(2) crystal plate is adopted as the substrate, and the sensing knots are covered by a thin MgF(2) slab to keep it steady and immunity to the environment fluctuations. Experimental results show that the temperature sensitivity of SMKR is approximately 52 pm/ degrees C within 30 degrees C approximately 700 degrees C, while the sensitivity of PMKR is approximately 266 pm/ degrees C within 20 degrees C approximately 80 degrees C. The temporal response of SMKR and PMKR sensors are less than 1 ms and 5 ms, respectively. These microfiber knot resonators can be used as miniature high temperature sensors with fast response. Higher resolution can be anticipated with further improvement of the Q factor of the microfiber knot resonators.
