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Proceedings Paper

Effect of doping swelling polymer cladding with phthalocyanine dye in plastic optical fiber humidity sensors
Author(s): Masayuki Morisawa; Haruyuki Yokomori
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Paper Abstract

We have developed and tested plastic optical fiber (POF)-type humidity sensors, which consist of a dye-doped swelling polymer cladding. POF-type humidity sensors consist of a hydroxyethyl cellulose or polyvinylpyrrolidone (PVP) cladding layer that surrounds a poly(methyl methacrylate) core. The operation of these sensors is based on the change in refractive index caused by swelling of the cladding layer. To improve the sensitivity of the humidity sensor, we have investigated the effect of doping the cladding polymer with phthalocyanine dye. The results indicate that the POF-type humidity sensor using PVP is three times more sensitive for relative humidities above 80% when the dyedoped swelling-polymer cladding is used.

Paper Details

Date Published: 17 May 2011
PDF: 4 pages
Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77534F (17 May 2011); doi: 10.1117/12.884678
Show Author Affiliations
Masayuki Morisawa, Univ. of Yamanashi (Japan)
Haruyuki Yokomori, Univ. of Yamanashi (Japan)

Published in SPIE Proceedings Vol. 7753:
21st International Conference on Optical Fiber Sensors
Jacques Albert; Wojtek J. Bock, Editor(s)

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