Volatile organic compounds optical fiber gas sensor based on evanescentl field coupling and solvatochromism

Author

Jae-Sung Lee ; Sang-won Lee ; Hyun-Min Jeong ; Sung-woo Lim ; Eun-Yoon Jang ; Na-Rae Yoon ; Dae-Hyuk Kwon ; Shin-Won Kang

Author_Institution

Sch. of Electron. Eng., Kyungpook Nat. Univ., Daegu, South Korea

fYear

2013

fDate

3-6 Nov. 2013

Firstpage

1

Lastpage

4

Abstract

We have developed an optical gas sensor for detection of volatile organic compounds (VOCs) gases. The side-polished optical fiber coupled with the polymer planar waveguide (PWG) which has high sensitive to change refractive index. The PWG was fabricated by coating the solvatochromic dye with a polyvinyl pyrrolidone (PVP). The fabricated gas sensor system was tested with five-types of VOCs gases. The different polarities of the VOC gases cause changes in the effective refractive index of the sensing membrane owing to evanescent field coupling. According to the results, the proposed gas sensor showed high sensitivity.

Keywords

dyes; fibre optic sensors; gas sensors; optical planar waveguides; optical polymers; organic compounds; refractive index; evanescent field coupling; membrane; optical fiber gas sensor; polymer planar waveguide; polyvinyl pyrrolidone; refractive index; side-polished optical fiber; solvatochromic dye; solvatochromism; volatile organic compounds; Gas detectors; Gases; Optical fiber sensors; Optical fibers;

fLanguage

English

Publisher

ieee

Conference_Titel

SENSORS, 2013 IEEE

Conference_Location

Baltimore, MD

ISSN

1930-0395

Type

conf

DOI

10.1109/ICSENS.2013.6688190

Filename

6688190