Hardware error correction for programmable photonics

Abstract

Programmable photonic circuits of reconfigurable interferometers can be used to implement arbitrary operations on optical modes, facilitating a flexible platform for accelerating tasks in quantum simulation, signal processing, and artificial intelligence. A major obstacle to scaling up these systems is static fabrication error, where small component errors within each device accrue to produce significant errors within the circuit computation. Mitigating this error usually requires numerical optimization dependent on real-time feedback from the circuit, which can greatly limit the scalability of the hardware. Here we present a deterministic approach to correcting circuit errors by locally correcting hardware errors within individual optical gates. We apply our approach to simulations of large scale optical neural networks and infinite impulse response filters implemented in programmable photonics, finding that they remain resilient to component error well beyond modern day process tolerances. Our results highlight a new avenue for scaling up programmable photonics to hundreds of modes within current day fabrication processes.

arXiv comment23 pages (9 main and 14 supplementary), 13 figures (6 main and 7 supplementary). Comments welcome

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• An Electro-Photonic System for Accelerating Deep Neural Networks
• Accurate Self-Configuration of Rectangular Multiport Interferometers
• Addressing the programming challenges of practical interferometric mesh based optical processors
• Stability of Self-Configuring Large Multiport Interferometers
• Scalable and Robust Photonic Integrated Unitary Converter
• Characterization and Optimization of Integrated Silicon-Photonic Neural Networks under Fabrication-Process Variations
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• Architecture agnostic algorithm for reconfigurable optical interferometer programming
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• Universal linear optics by programmable multimode interference
• Mirage: An RNS-Based Photonic Accelerator for DNN Training
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• Emergence of biased errors in imperfect photonic circuits