27 June 2017 Tunable air-suspended polymer grating couplers
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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    nm K 1 matching the theoretical considerations.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Christoph Prokop, Tobias Schmalz, Philipp Kleessen, Bert Laegel, Sandra Wolff, Arnan Mitchell, Christian Karnutsch, "Tunable air-suspended polymer grating couplers," Optical Engineering 56(6), 067112 (27 June 2017). https://doi.org/10.1117/1.OE.56.6.067112 . Submission: Received: 10 April 2017; Accepted: 5 June 2017
Received: 10 April 2017; Accepted: 5 June 2017; Published: 27 June 2017

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