title: Ultrasensitive temperature sensor based on an isopropanol-sealed optical microfiber taper.
abstract: We demonstrate an ultrasensitive temperature sensor based on an isopropanol-sealed optical microfiber taper (OMT) in a capillary. The OMT is highly sensitive to ambient refractive index (RI) with a maximum sensitivity of 18989 nm/RI unit in the range of 1.3955-1.4008. The thermo-optic effect of isopropanol and the thermal expansions of the sealant and sealed liquid turn the OMT into an ultrasensitive temperature sensor with the maximum sensitivity of -3.88 nm/°C in the range of 20°C-50°C. The temperature sensitivity contributions from different mechanisms are also investigated theoretically and experimentally.
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Xue
authors.forename: Yong-Sen
authors.initials: YS
authors.lastname: Yu
authors.forename: Rui
authors.initials: R
authors.lastname: Yang
authors.forename: Chuang
authors.initials: C
authors.lastname: Wang
authors.forename: Chao
authors.initials: C
authors.lastname: Chen
authors.forename: Jing-Chun
authors.initials: JC
authors.lastname: Guo
authors.forename: Xuan-Yu
authors.initials: XY
authors.lastname: Zhang
authors.forename: Cong-Cong
authors.initials: CC
authors.lastname: Zhu
authors.forename: Hong-Bo
authors.initials: HB
authors.lastname: Sun