More with less: fault-tolerance and information-theoretic optimality in programmable photonics

Ryan Hamerly

doi:10.1117/12.3029941

3 October 2024 More with less: fault-tolerance and information-theoretic optimality in programmable photonics

Ryan Hamerly

Proceedings Volume PC13113, Photonic Computing: From Materials and Devices to Systems and Applications; PC131130N (2024) https://doi.org/10.1117/12.3029941
Event: Nanoscience + Engineering, 2024, San Diego, California, United States

Abstract

To scale up programmable photonic circuits, one must overcome challenges of size, power, and robustness to hardware imperfections. Considering linear multiport interferometers as a concrete example, we show how architectural choices can significantly improve the prospects for scalability. First, we review the field of photonic-circuit error correction, and show how 3-splitter MZI (3-MZI) architectures are more robust to errors than standard MZI architectures, even achieving asymptotic fault-tolerance to hardware imperfections. Second, we discuss the problem of economizing phase-shift, which is especially relevant for power-hungry thermo-optic platforms, and show how the 3-MZI architecture can reduce average phase shifts by a factor of 3-10x in near-term systems.

Conference Presentation

Citation Download Citation

Ryan Hamerly "More with less: fault-tolerance and information-theoretic optimality in programmable photonics", Proc. SPIE PC13113, Photonic Computing: From Materials and Devices to Systems and Applications, PC131130N (3 October 2024); https://doi.org/10.1117/12.3029941

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