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Proceedings Paper

Effect of the clad transparency condition in POF humidity sensors with the swelling polymer clad
Author(s): Shigeaki Kato; Masayuki Morisawa
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Paper Abstract

We have developed plastic optical fiber (POF)-type humidity sensors, which consist of swelling polymer cladding. The proposed sensor consists of a polyvinylpyrrolidone (PVP) cladding layer that surrounds a poly(methyl methacrylate) core. The operation of the sensor is based on the POF structure changing from a leaky-POF to a guided-POFbecause of the changes in the refractive index caused by swelling of the cladding layer in high humidity. Therefore, the clad transparency condition before swelling affects the sensitivity of the sensor. In this study, to investigate the effect of the clad transparency condition, we fabricated three types of POF humidity sensors, which have different transparent cladding. The results indicate that the sensitivity of the sensor was improved by using the dye-doped swelling polymer clad.

Paper Details

Date Published: 7 November 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84215Z (7 November 2012); doi: 10.1117/12.966402
Show Author Affiliations
Shigeaki Kato, Univ. of Yamanashi (Japan)
Masayuki Morisawa, Univ. of Yamanashi (Japan)

Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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