title: Miniature fiber-optic temperature sensors based on silica/polymer microfiber knot resonators.
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.
authors.affiliation: Key Lab of Broadband Optical Fiber Transmission & Communication Networks Technology (Education Ministry of China), University of Electronic Science & Technology of China, Chengdu, Sichuan 610054, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Wu
authors.forename: Yun-Jiang
authors.initials: YJ
authors.lastname: Rao
authors.forename: Yi-Huai
authors.initials: YH
authors.lastname: Chen
authors.forename: Yuan
authors.initials: Y
authors.lastname: Gong
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008904:Miniaturization; D011108:Polymers / Q000737:chemistry*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012822:Silicon Dioxide / Q000737:chemistry*; D013821:Thermometers; D014159:Transducers
chemical_list: D011108:Polymers; D012822:Silicon Dioxide