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Ultracompact AWG Using Air-Trench Bends With Perfluorocyclobutyl Polymer Waveguides

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7 Author(s)
Yongbin Lin ; Nano & Micro Device Center (NMDC), Univ. of Alabama in Huntsville, Huntsville, AL ; Nazli Rahmanian ; Seunghyun Kim ; Gregory P. Nordin
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Using air-trench bends, an ultracompact 8 times 8 arrayed waveguide grating (AWG) demultiplexer (200-GHz channel spacing) for wavelength-division multiplexing (WDM) has been designed and fabricated with perfluorocyclobutyl (PFCB) core and clad co-polymers on a polyimide substrate. Compared to a conventional AWG in the same material system, the air-trench bend AWG shrinks the required chip area by a factor of 20. The decreased size is a factor in reducing the measured thermal shift to -0.012 nm/degC and decreasing the polarization-dependent wavelength shift to 1.3 nm.

Published in:

Journal of Lightwave Technology  (Volume:26 ,  Issue: 17 )