An orbital angular momentum mode comb generating device, a construction method and an orbital angular momentum mode comb generating method

CN122131498APending Publication Date: 2026-06-02SHENZHEN UNIV

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: SHENZHEN UNIV
Filing Date: 2026-03-30
Publication Date: 2026-06-02

AI Technical Summary

Technical Problem

Existing technologies struggle to achieve customized generation of high-dimensional, complex orbital angular momentum combs, especially in terms of joint angular and radial control. Furthermore, they suffer from issues such as unbalanced energy distribution and limited degrees of freedom in control.

Method used

A forward propagation model of a diffraction neural network is constructed. By acquiring the feature mapping dataset of the input light field and the target light field, the diffraction neural network is trained, the optimal phase distribution of the multi-level diffraction layers is calculated, and a multi-level phase modulation system is constructed to achieve joint control of the angular and radial exponents.

Benefits of technology

It has achieved the customized generation of high-fidelity Laguerre-Gaussian mode combs, possessing a high degree of freedom in optical field manipulation, and is suitable for optical computing and high-dimensional optical communication.

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Abstract

The application discloses an orbital angular momentum mode comb generation device, a construction method and an orbital angular momentum mode comb generation method. The construction method comprises the following steps: constructing a diffraction neural network forward propagation model for Laguerre-Gaussian mode comb generation; acquiring an input light field with preset characteristic parameters and a target light field, and constructing a characteristic mapping dataset; training the diffraction neural network forward propagation model based on the mapping dataset, and calculating an optimal phase distribution of a multistage diffraction layer; constructing a multistage phase modulation system according to the optimal phase distribution, and obtaining the orbital angular momentum mode comb generation device. The application realizes customized generation of Laguerre-Gaussian mode combs with various different shapes and mode composition schemes in the range of angular index and radial index, and the generated mode comb has high fidelity and precise mode spectrum distribution, and has a wide application prospect in the fields of optical computing and high-dimensional optical communication.

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