Title :
Relative Humidity Sensor Based on SMS Fiber Structure With Two Waist-Enlarged Tapers
Author :
Jiali An ; Yongxing Jin ; MingMing Sun ; Xinyong Dong
Author_Institution :
Inst. of Optoelectron. Technol., China Jiliang Univ., Hangzhou, China
Abstract :
An all-fiber relative humidity (RH) sensor based on single-mode-multimode-single-mode fiber structure with two waist-enlarged tapers is proposed and experimentally demonstrated. It is fabricated by waist-enlarged splicing a section of multimode fiber (MMF) between two single-mode fibers. A thin layer of polyvinyl alcohol is dip-coated onto the MMF and two bitapers. The proposed sensor resonance wavelength peak shifts to longer wavelengths with the RH increasing. The sensitivity of the RH measurement of 0.223 nm/%RH in the range from 35% to 85% RH is experimentally achieved.
Keywords :
dip coating; fibre optic sensors; humidity measurement; humidity sensors; optical fibre fabrication; polymer films; splicing; thin film sensors; MMF; RH measurement; SMS fiber structure; all fibre relative humidity sensor; bitaper; dip coating; multimode fiber; sensor resonance wavelength peak shifts; single mode fiber; single mode multimode single mode fiber structure; thin polyvinyl alcohol layer; waist enlarged splicing; waist enlarged taper; Educational institutions; Humidity; Optical fiber sensors; Optical fibers; Optoelectronic and photonic sensors; Temperature sensors; SMS fiber structure; relative humidity; two waist-enlarged tapers;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2014.2313878
