Effect of the clad transparency condition in POF humidity sensors with the swelling polymer clad

Shigeaki Kato; Masayuki Morisawa

doi:10.1117/12.966402

7 November 2012 Effect of the clad transparency condition in POF humidity sensors with the swelling polymer clad

Shigeaki Kato, Masayuki Morisawa

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84215Z (2012) https://doi.org/10.1117/12.966402
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

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.

Citation Download Citation

Shigeaki Kato and Masayuki Morisawa "Effect of the clad transparency condition in POF humidity sensors with the swelling polymer clad", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84215Z (7 November 2012); https://doi.org/10.1117/12.966402

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