Diffractive Deep Neural Network (D2NN) processing using a single modulation layer

By using a single 2D modulation layer and nonlinear layer in D2NN, combining reflection and diffraction structures, the problems of complex design and optical power loss in existing D2NN are solved, and simpler and more efficient optical processing is achieved.

CN114402253BActive Publication Date: 2025-03-28HUAWEI TECH CO LTD
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Patent Information

Application Number
CN201980100490.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2019-11-21
Publication Date
2025-03-28
Estimated Expiration
2039-11-21

AI Technical Summary

Technical Problem

The design of existing D2NNs is complex, requiring multiple 2D modulation layers to result in large volumes, and difficulty in optical power loss and nonlinear material insertion.

Method used

A single 2D modulation layer is used for D2NN processing, multiple modulation is achieved through reflection and diffraction layers, and nonlinear layers and lenses are introduced into the structure to improve performance.

Benefits of technology

The D2NN design is simplified, the optical power loss is reduced, the introduction of nonlinear materials is facilitated, and the interference of modulator drivers to optical transmission is reduced.

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Abstract

A device, comprising: a first reflector; a second reflector; a modulation layer located between the first reflector and the second reflector and comprising a plurality of modulation regions; a diffraction layer located between the modulation layer and the second reflector; and an input port for admitting a light beam into the device. The light beam passes through the diffraction layer and is modulated by the modulation layer to produce a first modulated light beam before being reflected by the first reflector, the first reflector reflecting the first modulated light beam toward the second reflector, and the second reflector reflecting the first modulated light beam toward the modulation layer for at least a second modulation.
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