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A Planar low-cost full-polymer Optical Humidity Sensor

By Christian Kelb, Martin Körner, Oswald Prucker, Jürgen Rühe, Eduard Reithmeier and Bernhard Roth


AbstractWe 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

Publisher: The Author(s). Published by Elsevier Ltd.
Year: 2016
DOI identifier: 10.1016/j.protcy.2016.08.066
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