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Graphene Oxide Functionalized Optical Planar Waveguide for Water Content Measurement in Alcohol

Photonic Sensors 2020年第3期10卷 215-222页

作者： Wenghong LIM yuenkiat yap Choonkong LAI Wuyi CHONG Harith AHMAD Photonics Research Centre University of MalayaKuala Lumpur 50603Malaysia Heriot-Watt University Malaysia Putrajaya 62200Malaysia Department of Physics Faculty of ScienceUniversity of MalayaKuala Lumpur 50603Malaysia

An abrupt change in optical transmission characteristic of a graphene oxide(GO)coated optical planar waveguide was *** observation was based on the peculiar characteristics of the graphene oxide film,namely its high transverse-electric polarized light propagation loss,highly selective permeability of water,and change in optical propagation characteristic in the presence of *** as-fabricated GO-coated optical waveguide showed a large polarization dependent loss of~32 dB in the C-band optical fiber communication window(1550 nm).The response of the proposed sensor was first tested by using *** a drop of water was applied onto the GO coating,the large polarization dependent loss was fully suppressed almost *** effect was reversible as the polarization dependent loss was restored after complete water evaporation from the GO ***-optical measurement of water content in alcohol was then demonstrated by using the GO-coated optical *** analyzing the drying profile of the water-alcohol mixture,water content in the range of 0.2 volume%-100 volume%could be *** measurements were carried out by using solution volume of 1.0μL *** all-optical sensing nature of the proposed sensor has potential applications in in-situ monitoring of water content in alcohol.

关键词： Graphene oxide water content alcohol solution optical waveguide

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