Open AccessNovel polyimide coated fiber Bragg grating sensing network for relative humidity measurements
Author(s) -
Wei Bai,
Minghong Yang,
Jixiang Dai,
Hongquan Yu,
Gaopeng Wang,
Chongjie Qi
Publication year - 2016
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.003230
Subject(s) - fiber bragg grating , materials science , optics , relative humidity , phosfos , fiber optic sensor , multiplexing , optical fiber , long period fiber grating , polyimide , optoelectronics , plastic optical fiber , telecommunications , wavelength , physics , nanotechnology , layer (electronics) , computer science , thermodynamics
A novel relative humidity (RH) sensing network based on ultra-weak fiber Bragg gratings (FBGs) is proposed and demonstrated. Experiment is demonstrated on a 5 serial ultra-weak FBGs sensing network chopped from a fiber array with 1124 FBGs. Experimental results show that the corresponding RH sensitivity varies from 1.134 to 1.832 pm/%RH when ambient environmental RH changes from 23.8%RH to 83.4%RH. The low-reflectance FBGs and time-division multiplexing (TDM) technology makes it possible to multiplex thousands of RH sensors in single optical fiber.