title: Temperature sensing using the bandgap-like effect in a selectively liquid-filled photonic crystal fiber.
abstract: A compact temperature sensor based on a selectively liquid-filled photonic crystal fiber (PCF) is proposed using controlled hole collapse in PCF post-processing. The first ring around the core is filled with liquid of higher refractive index than the matrix, while the outer rings of holes are filled with air. The bandgap (BG)-like effect of the high refractive index ring is analyzed. Absorption loss spectra of the fiber are found to be quite sensitive to the refractive index of liquid when the liquid is lossy. Using the BG-like effect, a fiber temperature sensor is fabricated by selectively injecting a mixture of dimethyl sulfoxide and aqueous gold colloids with a high thermo-optic coefficient to the PCF. Temperature sensitivity up to -5.5 nm/°C is experimentally confirmed.
authors: College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha, China.
authors: Yang
authors: Y
authors: Peng
authors: Jing
authors: J
authors: Hou
authors: Yang
authors: Y
authors: Zhang
authors: Zhihe
authors: Z
authors: Huang
authors: Rui
authors: R
authors: Xiao
authors: Qisheng
authors: Q
authors: Lu
mesh_terms: D003102:Colloids / Q000737:chemistry*; D003198:Computer Simulation; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D004867:Equipment Design; D005336:Fiber Optic Technology; D006046:Gold / Q000737:chemistry*; D050866:Liquid Crystals; D008855:Microscopy, Electron, Scanning / Q000379:methods; D055095:Optics and Photonics; D017785:Photons; D012031:Refractometry; D013696:Temperature
chemical_list: D003102:Colloids; D006046:Gold; D004121:Dimethyl Sulfoxide