Abstract

We propose and demonstrate a low-power 2×2 total internal reflection thermo-optic switch based on an X-junction configuration formed with a silicon oxynitride (SiON) core and polymer cladding. Unlike X-junctions reported thus far, our proposed configuration features a slot formed on the center of the X-junction and filled with polymer cladding. With such a configuration, the opposite thermo-optic characteristics of SiON and polymer and, hence, heat utilization efficiency can be fully utilized. Our fabricated proof-of-principle switch shows extinction ratios of larger than 15.34 dB and switching powers of less than 59.6mW. The rise time and fall time of switching are 1.42 and 0.85 ms, respectively. The insertion losses are less than 10.6 dB for all channels, and the polarization-dependent loss is 0.3dB.

© 2018 Optical Society of America

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