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Fully reconfigurable coherent optical vector-matrix multiplication

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arxiv 2009.12095 v1 pith:TRHI55V4 submitted 2020-09-25 physics.optics physics.app-ph

classification physics.opticsphysics.app-ph
keywords opticalmultiplicationparallelreconfigurablemultipliervector-matrixalgebraicblock
verification ladder T0 review T1 audit T2 compute T3 formal
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Optics is a promising platform in which to help realise the next generation of fast, parallel and energy-efficient computation. We demonstrate a reconfigurable free-space optical multiplier that is capable of over 3000 computations in parallel, using spatial light modulators with a pixel resolution of only 340x340. This enables vector-matrix multiplication and parallel vector-vector multiplication with vector size of up to 56. Our design is the first to simultaneously support optical implementation of reconfigurable, large-size and real-valued linear algebraic operations. Such an optical multiplier can serve as a building block of special-purpose optical processors such as optical neural networks and optical Ising machines.

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Cited by 1 Pith paper

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  1. Complexity-energy trade-off in programmable unitary interferometers

    physics.optics 2025-07 conditional novelty 6.0 of 10

    Programmable optical interferometers face a trade-off: faster, simpler programming generally means losing up to a factor of n in useful output light energy.

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