title: Nanocomposite polyacrylamide based open cavity fiber Fabry-Perot humidity sensor.
abstract: A humidity sensor with a low temperature sensitivity is proposed and demonstrated by coating a nanocomposite hygrometer polyacrylamide in an open interferometric cavity of a fiber Fabry-Perot interferometer. In this paper the Fabry-Perot structure is formed by splicing one short section of single mode fiber between two sections of single mode fiber with a larger offset fusing method. Experimental results show that relative humidity (RH) sensitivity of the sensor is ∼0.1 nm/(1% RH) in the range of 38% to 78% RH and ∼5.868 nm/(1%RH) in the range of 88% to 98% RH, respectively.
authors.affiliation: Key Laboratory of Optoelectronic Technology and Systems, Education Ministry of China, Chongqing University, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Yao
authors.forename: Tao
authors.initials: T
authors.lastname: Zhu
authors.forename: De-Wen
authors.initials: DW
authors.lastname: Duan
authors.forename: Ming
authors.initials: M
authors.lastname: Deng