标题：TiO2 nanoparticle thin film-coated optical fiber Fabry-Perot sensor
作者：Jiang, Mingshun; Li, Qiu-Shun; Wang, Jun-Nan; Jin, Zhongwei; Sui, Qingmei; Ma, Yaohong; Shi, Jianguo; Zhang, Faye; Jia, Lei; Yao, We 更多 作者机构：[Jiang, Mingshun; Jin, Zhongwei; Sui, Qingmei; Zhang, Faye; Jia, Lei; Dong, Wen-Fei] Shandong Univ, Sch Control Sci & Engn, Jinan 250061, Peoples R Ch 更多
通讯作者地址：[Jiang, MS]Shandong Univ, Sch Control Sci & Engn, Jinan 250061, Peoples R China.
摘要：In this paper, a novel TiO2 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 TiO2 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 similar to 1.457 to 1.333 similar to 1.8423. More importantly, its optical properties exhibited the unique temperature-independent performance. Therefore, owing to these special optical properties, the TiO2 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. (C) 2013 Optical Society of America