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, Christoph Prokop, Tobias Schmalz, Tobias Schmalz, Philipp Kleessen, Philipp Kleessen, Bert Laegel, Bert Laegel, Sandra Wolff, Sandra Wolff, Arnan Mitchell, Arnan Mitchell, Christian Karnutsch, 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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