Topology-optimized silicon photonic wire mode (de)multiplexer

Louise F. Frellsen; Lars H. Frandsen; Yunhong Ding; Yuriy Elesin; Ole Sigmund; Kresten Yvind

doi:10.1117/12.2078732

27 February 2015 Topology-optimized silicon photonic wire mode (de)multiplexer

Louise F. Frellsen, Lars H. Frandsen, Yunhong Ding, Yuriy Elesin, Ole Sigmund, Kresten Yvind

Proceedings Volume 9367, Silicon Photonics X; 93670X (2015) https://doi.org/10.1117/12.2078732
Event: SPIE OPTO, 2015, San Francisco, California, United States

Abstract

We have designed and for the first time experimentally verified a topology optimized mode (de)multiplexer, which demultiplexes the fundamental and the first order mode of a double mode photonic wire to two separate single mode waveguides (and multiplexes vice versa). The device has a footprint of ~4.4 μm x ~2.8 μm and was fabricated for different design resolutions and design threshold values to verify the robustness of the structure to fabrication tolerances. The multiplexing functionality was confirmed by recording mode profiles using an infrared camera and vertical grating couplers. All structures were experimentally found to maintain functionality throughout a 100 nm wavelength range limited by available laser sources and insertion losses were generally lower than 1.3 dB. The cross talk was around -12 dB and the extinction ratio was measured to be better than 8 dB.

Citation Download Citation

Louise F. Frellsen, Lars H. Frandsen, Yunhong Ding, Yuriy Elesin, Ole Sigmund, and Kresten Yvind "Topology-optimized silicon photonic wire mode (de)multiplexer", Proc. SPIE 9367, Silicon Photonics X, 93670X (27 February 2015); https://doi.org/10.1117/12.2078732

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