title: TiO2 nanoparticle thin film-coated optical fiber Fabry-Perot sensor.
abstract: In this paper, a novel TiO(2) nanoparticle thin film coated optical fiber Fabry-Perot (F-P) sensor had been developed for refractive index (RI) sensing by monitoring the shifts of the fringe contrast in the reflectance spectra. Using in situ liquid phase deposition approach, the TiO(2) nanoparticle thin film could be formed on the fiber surface in a controlled fashion. The optical properties of as-prepared F-P sensors were investigated both theoretically and experimentally. The results indicated that the RI sensitivity of F-P sensors could be effectively improved after the deposition of nanoparticle thin-films. It was about 69.38 dB/RIU, which was 2.6 times higher than that of uncoated one. The linear RI measurement range was also extended from 1.333~1.457 to 1.333~1.8423. More importantly, its optical properties exhibited the unique temperature-independent performance. Therefore, owing to these special optical properties, the TiO(2) nanoparticle thin film coated F-P sensors have great potentials in medical diagnostics, food quality testing, environmental monitoring, biohazard detection and homeland security, even at elevated temperature.
authors.affiliation: School of Control Science and Engineering, Shandong University, Jinan 250061, China.
authors.forename: Mingshun
authors.initials: M
authors.lastname: Jiang
authors.forename: Qiu-Shun
authors.initials: QS
authors.lastname: Li
authors.forename: Jun-Nan
authors.initials: JN
authors.lastname: Wang
authors.forename: Zhongwei
authors.initials: Z
authors.lastname: Jin
authors.forename: Qingmei
authors.initials: Q
authors.lastname: Sui
authors.forename: Yaohong
authors.initials: Y
authors.lastname: Ma
authors.forename: Jianguo
authors.initials: J
authors.lastname: Shi
authors.forename: Faye
authors.initials: F
authors.lastname: Zhang
authors.forename: Lei
authors.initials: L
authors.lastname: Jia
authors.forename: Wei-Guo
authors.initials: WG
authors.lastname: Yao
authors.forename: Wen-Fei
authors.initials: WF
authors.lastname: Dong
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D007368:Interferometry / Q000295:instrumentation*; D008567:Membranes, Artificial; D053758:Nanoparticles / Q000737:chemistry*; D055100:Optical Fibers; D012031:Refractometry / Q000295:instrumentation*; D014025:Titanium / Q000737:chemistry*; D014159:Transducers
chemical_list: D008567:Membranes, Artificial; C009495:titanium dioxide; D014025:Titanium