Tunable air-suspended polymer grating couplers

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

doi:10.1117/1.OE.56.6.067112

27 June 2017 Tunable air-suspended polymer grating couplers

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

Author Affiliations +

Optical Engineering, Vol. 56, Issue 6, 067112 (June 2017). https://doi.org/10.1117/1.OE.56.6.067112

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 nm K−1 matching the theoretical considerations.

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

Received: 10 April 2017; Accepted: 5 June 2017; Published: 27 June 2017

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