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Article

Simulation and Experimental Verification of the Thermal Behaviour of Self-Written Waveguides

1
Institute of High Frequency Technology, Technical University Braunschweig, Schleinitzstraße 22, 38106 Braunschweig, Germany
2
Cluster of Excellence PhoenixD (Photonics, Optics and Engineering—Innovation Across Disciplines), 30167 Hannover, Germany
3
Hannover Centre for Optical Technologies, Leibniz University of Hannover, Nienburger Str. 17, 30167 Hannover, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Detlef Kip
Appl. Sci. 2021, 11(17), 7881; https://doi.org/10.3390/app11177881
Received: 12 July 2021 / Revised: 23 August 2021 / Accepted: 24 August 2021 / Published: 26 August 2021
In this work, we investigated the optical response of a self-written waveguide (SWW) in detail by heating the structure from room temperature up to 60 °C. Previous results indicated a decrease in the optical transmission with increasing temperature for certain waveguide parameters. Based on new experimental measurements, we have identified material parameters resulting in opposite behaviour. An experimental setup was conceived to verify these results. Hereby, we were able to show that we can adjust material parameters such as refractive index and the corresponding density of the material by adapting the curing time applied during the fabrication of the waveguides. This, in turn, affects the material’s response during the heating process. We showed that a limitation of the external curing time changes the internal conditions of the SWW and the cladding in a manner that the numerical aperture increases with the temperature, which subsequently also results in an increase in the optical transmission. In this study, we explain this unexpected behavior of the SWW and point towards possible future applications. View Full-Text
Keywords: optical interconnects; self-written waveguides; optical simulation; refractive index measurements; thermal simulation; optical sensor optical interconnects; self-written waveguides; optical simulation; refractive index measurements; thermal simulation; optical sensor
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MDPI and ACS Style

Günther, A.; Baran, M.; Kowalsky, W.; Roth, B. Simulation and Experimental Verification of the Thermal Behaviour of Self-Written Waveguides. Appl. Sci. 2021, 11, 7881. https://doi.org/10.3390/app11177881

AMA Style

Günther A, Baran M, Kowalsky W, Roth B. Simulation and Experimental Verification of the Thermal Behaviour of Self-Written Waveguides. Applied Sciences. 2021; 11(17):7881. https://doi.org/10.3390/app11177881

Chicago/Turabian Style

Günther, Axel, Murat Baran, Wolfgang Kowalsky, and Bernhard Roth. 2021. "Simulation and Experimental Verification of the Thermal Behaviour of Self-Written Waveguides" Applied Sciences 11, no. 17: 7881. https://doi.org/10.3390/app11177881

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