Coherent Homodyne Synaptic Interconnect with Sign- and Weight-Tunable Detection

Schrenk, Bernhard

doi:10.1364/ofc.2021.tu5h.7

Optical Fiber Communication Conference (OFC) 2021 2021

DOI: 10.1364/ofc.2021.tu5h.7

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Coherent Homodyne Synaptic Interconnect with Sign- and Weight-Tunable Detection

Bernhard Schrenk

Abstract: We experimentally investigate a synaptic interconnect with low-complexity emitter and coherent receiver. Phase tuning of the LO enables the signed multiplication of the detected signal, which is demonstrated for 130-ps spikes at 1-GHz repetition rate.

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Simplified Coherent Synaptic Receptor for Filterless Optical Neural Networks

Schrenk

2022

IEEE J. Select. Topics Quantum Electron.

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Neuromorphic computing is touted to be a game changer for existing and emerging data processing applications. Towards this direction, artificial neural network implementations have moved into the focus of research. Advancing neural networks to the optical domain offers several advantages, such as high data throughput at time-of-flight inference latency. The present work proposes coherent synaptic interconnects as a path towards filterless neural networks with increased routing flexibility. A coherent synaptic receptor with integrated weighing functionality is experimentally investigated and evaluated for a 1-GHz train of 130-ps wide spikes. Homodyne detection is accomplished through use of an optically injection locked local oscillator, while its phase and the responsivity of the co-integrated photodiode are exploited to realize a tunable weight upon reception of the incoming optical spikes. Moreover, the switching of the sign is shown for the detection weight, underpinning the feasibility to extend the allocation of synapses toward both, wavelength and time dimensions.

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Simplified Coherent Synaptic Receptor for Filterless Optical Neural Networks

Schrenk

2022

IEEE J. Select. Topics Quantum Electron.

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Coherent Homodyne Synaptic Interconnect with Sign- and Weight-Tunable Detection

Abstract: We experimentally investigate a synaptic interconnect with low-complexity emitter and coherent receiver. Phase tuning of the LO enables the signed multiplication of the detected signal, which is demonstrated for 130-ps spikes at 1-GHz repetition rate.

Cited by 1 publication

References 11 publications

Simplified Coherent Synaptic Receptor for Filterless Optical Neural Networks

Simplified Coherent Synaptic Receptor for Filterless Optical Neural Networks

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