Improvement in response of swelling clad-type POF humidity sensor using a multicladding layer

Author

Morisawa, Masayuki ; Kato, Shigeaki

Author_Institution

Interdiscipl. Grad. Sch. of Med. & Eng., Univ. of Yamanashi, Kofu, Japan

fYear

2014

fDate

2-5 Nov. 2014

Firstpage

1799

Lastpage

1802

Abstract

In this study, we develop a leaky-waveguide mode conversion-type plastic optical fiber (POF) sensor and examine its response to humidity. The cladding of this optical fiber is formed of a polymer that swells and decreases its refractive index in response to changes in moisture. In this study, we show that the absorbance of light in the cladding is effectively increased by dye-doping the swelling polymer cladding. Therefore, in this study, we attempt to improve the response characteristics of the POF sensor by making the cladding layer a multilayer structure consisting of a swelling polymer layer and a dye-doped swelling polymer layer.

Keywords

fibre optic sensors; humidity sensors; optical fibre cladding; polymer fibres; refractive index; swelling; dye-doped swelling polymer layer; leaky-waveguide mode conversion-type POF sensor; multicladding layer; multilayer structure; plastic optical fiber sensor; refractive index; swelling clad-type POF humidity sensor; swelling polymer cladding; Humidity; Optical fiber sensors; Plastic optical fiber; Polymers; Refractive index; Sensitivity; double-layer clad; humidity; phthalocyanine; plastic optical fiber; polyvinylpyrrolidone; swelling;

fLanguage

English

Publisher

ieee

Conference_Titel

SENSORS, 2014 IEEE

Conference_Location

Valencia

Type

conf

DOI

10.1109/ICSENS.2014.6985375

Filename

6985375