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Spurred by advances in scalable photonic system integration, ideas in photonic information processing have recently experienced a resurgence. We review the latest results in reconfigurable analog photonic networks, neuromorphic photonics, and multivariate RF photonics. These architectures could enable next-generation microwave signal processing and scientific computing.
Microring weight banks enable reconfiguration in analog photonic networks and multi-channel RF front-ends. We demonstrate 2-ring weight banks and show that they are tolerant to fabrication and thermal effects. Weights consisting of two microrings can potentially increase channel capacity by a factor of 2.72-fold.
Photonic weight banks employing multivariate statistical techniques could extend performance limits of multiantenna radio systems. We characterize the aggregate bandwidth penalty imposed by a silicon microring weight bank and assess application regimes for multivariate RF photonics.
Microring weight banks enable novel analog processing approaches in integrated photonics. Incorporating multivariate statistical techniques, microring weight banks can implement wideband, analog dimensionality reduction. We demonstrate principal component analysis of three 1GHz signals performed in a silicon microring weight bank.
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