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

Volume

14

Issue

8

fYear

2014

fDate

Aug. 2014

Firstpage

2683

Lastpage

2686

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;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2014.2313878

Filename

6778777