2023
DOI: 10.1088/1361-6501/acce59
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Unsaturated polyester resin/polymethylmethacrylate waveguide-based refractive index sensor with dual-wavelength temperature compensation

Abstract: This paper demonstrates an optical waveguide based- refractive index (RI) sensor using temperature compensation method. The optical waveguide was formed using a polymethylmethacrylate (PMMA) sheet as the cladding material and unsaturated polyester resin (UPR) as the core material. The sensor design consists of two input waveguide branches, a sensing area and an output branch. Two light emitting diodes (LEDs) with wavelength of 530 nm and 660 nm were used as light sources. In this work, temperature compensati… Show more

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