一种扩大涡旋光OAM态分检器检测范围的方法

By combining addition and subtraction phase and beam geometry transformation, the detection range of the vortex optical OAM state analyzer is expanded, solving the problem of insufficient detection range in the existing technology and enabling wider application.

CN116358699BActive Publication Date: 2026-07-17TAIYUAN UNIVERSITY OF TECHNOLOGY

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TAIYUAN UNIVERSITY OF TECHNOLOGY
Filing Date
2023-03-28
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

The current vortex optical OAM state detection range is insufficient, which limits its practical application in fields such as free-space optical communication and quantum computing.

Method used

By combining addition and subtraction phase modulation and beam geometry transformation, the detection range of the vortex optical OAM state analyzer is expanded. By using components such as addition and subtraction phase modulation and geometric transformation phase plate, the relative spacing between light spots is increased, thereby improving the pattern recognition rate and signal-to-noise ratio.

Benefits of technology

It expands the detection range of vortex light OAM state to -37 to +37, supporting a wider range of applications, such as free-space optical communication and quantum computing.

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Abstract

本发明涉及复合涡旋光轨道角动量分离与检测及光波前调制技术领域,公开了一种扩大涡旋光轨道角动量态OAM坐标变换分检器检测范围的方法,在原有坐标变换分检器的基础上,增加加法与减法相位。首先将待测光分为多束,分别入射到调制值不同的加减法相位上,此时各分路待测光的OAM态将被调制。调制后的光束入射到坐标变换分检器实现OAM态的检测,最终在各分路接收面上呈现光斑分布,不同位置光斑对应不同OAM态,将成像光斑分布通过计算机进行识别就可以判断出原始待测光的OAM态。本发明通过加减法相位的设计使待测光中绝对值较大的OAM态调制为绝对值较小的OAM态,进而实现对较大OAM态的检测。
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