A Planar low-cost full-polymer Optical Humidity Sensor

We present an all-polymer optical humidity sensor, based on a 1mm plastic optical fiber (POF) with a U-bend, cladded with poly(N,N-dimethylacrylamide) (PDMAA) in the sensing region. The cladding changes its scattering properties on absorption of environmental humidity, thus modulating the transmitte...

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Bibliographic Details
Published inProcedia technology Vol. 26; pp. 530 - 536
Main Authors Kelb, Christian, Körner, Martin, Prucker, Oswald, Rühe, Jürgen, Reithmeier, Eduard, Roth, Bernhard
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 2016
Subjects
evanescent wave sensor
humidity sensor
planar systems
polymer optics
Polymer waveguides
evanescent wave sensor
humidity sensor
planar systems
Polymer waveguides
polymer optics
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Summary:We present an all-polymer optical humidity sensor, based on a 1mm plastic optical fiber (POF) with a U-bend, cladded with poly(N,N-dimethylacrylamide) (PDMAA) in the sensing region. The cladding changes its scattering properties on absorption of environmental humidity, thus modulating the transmitted optical power through the sensor. We explain the working principle of the sensor and show experimental results regarding scattering behavior of the cladding material and sensitivity to sudden humidity changes. We also propose a planar layout suitable for application to a hot embossing or lamination process for large-scale fabrication.
ISSN:2212-0173
2212-0173
DOI:10.1016/j.protcy.2016.08.066