13 February 2016 Ultra-compact integrated silicon photonics balanced coherent photodetector
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Abstract
In this paper, the performance simulations of a novel ultra-compact balanced coherent photodetector for operation at a wavelength of 1.5 μm are presented and design proposals for future fabrication processes are provided. It consists of a compact 2x2 MMI that is evanescently coupled into a germanium MSM photodetection layer. The simulations demonstrate dark current less than 10 nA, capacitance less than 20 fF, and optical bandwidth in the 10-30 GHz range. We propose utilizing the simplicity of direct wafer bonding to bond the detection layer to the output waveguides to avoid complicated epitaxial growth issues. This ultra-compact device shows promise as a high-speed, low-cost integrated silicon photonics solution for the telecommunications infrastructure.
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Jason T. Meyer, Jason T. Meyer, Mahmoud Fallahi, Mahmoud Fallahi, "Ultra-compact integrated silicon photonics balanced coherent photodetector", Proc. SPIE 9774, Next-Generation Optical Communication: Components, Sub-Systems, and Systems V, 97740H (13 February 2016); doi: 10.1117/12.2213359; https://doi.org/10.1117/12.2213359
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