A high sensitivity temperature sensor based on packaged microfibre knot resonator

A novel temperature sensor has been proposed based on microfibre knot resonator packaged by polydimethylsiloxane (PDMS). Owing to the high thermal expansion and thermo-optic coefficients of PDMS, the resonant wavelength shifted obviously along with the changing of temperature. The experimental results indicated the approximate linear temperature sensing performance in the range of 24-38 degrees C and 40-54 degrees C, with the high sensitivities of 1.408 nm/degrees C and 0.973 nm/degrees C, respectively. Due to its excellent performances and easy fabrication process, the temperature sensor will be the promising candidate for monitoring the stability of air condition and organism. (C) 2017 Elsevier B.V. All rights reserved.