Materials, Photonic Devices, and Sensors

Tunable air-suspended polymer grating couplers

[+] Author Affiliations
Christoph Prokop, Christian Karnutsch

Karlsruhe University of Applied Sciences, Institute for Optofluidics and Nanophotonics, Karlsruhe, Germany

RMIT University, School of Engineering, Melbourne, Victoria, Australia

Tobias Schmalz, Philipp Kleessen

Karlsruhe University of Applied Sciences, Institute for Optofluidics and Nanophotonics, Karlsruhe, Germany

Bert Laegel, Sandra Wolff

Technische Universität Kaiserslautern, Nano Structuring Center and the State Research Center OPTIMAS, Kaiserslautern, Germany

Arnan Mitchell

RMIT University, School of Engineering, Melbourne, Victoria, Australia

Opt. Eng. 56(6), 067112 (Jun 27, 2017). doi:10.1117/1.OE.56.6.067112
History: Received April 10, 2017; Accepted June 5, 2017
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Abstract.  We present thermal tuning of air-suspended SU-8 polymer waveguide grating couplers for TE-polarized light. Numerical simulations have been performed to estimate the wavelength shift caused by the change of temperature. Due to the small positive thermal expansion and large negative thermo-optic coefficient of SU-8, a shift toward shorter wavelengths is expected. In the experimental evaluation, a negative wavelength shift from 1542 nm at 20°C toward 1527 nm at 56°C is obtained with approximately 0.42  nmK1 matching the theoretical considerations.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Christoph Prokop ; Tobias Schmalz ; Philipp Kleessen ; Bert Laegel ; Sandra Wolff, et al.
"Tunable air-suspended polymer grating couplers", Opt. Eng. 56(6), 067112 (Jun 27, 2017). ; http://dx.doi.org/10.1117/1.OE.56.6.067112


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