A Planar low-cost full-polymer Optical Humidity Sensor. (2016)

• Record Type: Journal Article
• Authors: Kelb, Christian; Körner, Martin; Prucker, Oswald; Rühe, Jürgen; Reithmeier, Eduard; Roth, Bernhard
• Is Part Of: Procedia technology. Volume 26(2016)
• Page Start: 530
• Page End: 536
• Publication Date: 2016
• Subjects: Polymer waveguides -- polymer optics -- planar systems -- humidity sensor -- evanescent wave sensor; Technology -- Congresses; Technology -- Periodicals; Engineering -- Congresses; Engineering -- Periodicals; Engineering; Technology; Conference proceedings; Periodicals; 605
• DOI: 10.1016/j.protcy.2016.08.066
• Languages: English
• ISSNs: 2212-0173

Abstract

Abstract: We present an all-polymer optical humidity sensor, based on a 1 mm 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.