近红外分数涡旋光束的直接探测

IF 3.1 3区物理与天体物理 Q2 INSTRUMENTS & INSTRUMENTATION

Infrared Physics & Technology Pub Date : 2025-04-28 DOI:10.1016/j.infrared.2025.105893

Hui Zhao , Ruwei Zhao , Qilu Liu , Xiaokang Hu , Tianxiang Xu , Yan Sheng

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引用次数: 0

摘要

本文报道了一种直接探测近红外光束分数轨道角动量（FOAM）的方案。利用设计的非线性Dammann分数涡光栅（NDFVG），可以将近红外分数光学涡流转换成具有相似强度的多通道可见光模式，并根据衍射光束的强度分布来读取FOAM的范围。总结了一种最多只需要观察三个点的快速方法。FOAM的检测精度为0.1，可通过调整光栅结构进行优化。在LiNbO3晶体中制备了所设计的NDFVG，并以0.1的入射FOAM为例演示了检测过程。该方法可满足光学操作、成像和综合光通信系统对近红外光涡旋检测的广泛需求。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Direct detection of near-infrared fractional vortex beam

We report a scheme for direct detection of fractional orbital angular momentum (FOAM) of near-infrared optical beams. By using a designed nonlinear Dammann fractional vortex grating (NDFVG), near-infrared fractional optical vortex could be converted to a multi-channel visible pattern with similar intensities, and the range of FOAM could be read on the basis of the intensity profiles of diffracted beams. A fast method is summarized, which only requires observation at most three points. The detection accuracy of FOAM is 0.1, and it can be optimized by tuning the grating structure. The designed NDFVG is fabricated in a LiNbO₃ crystal, and the detection process is demonstrated with incident FOAM of 0.1 as an example. This method may meet the wide requirements of near-infrared optical vortex detection in optical operation, imaging, and integrated optical communication systems.

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来源期刊

Infrared Physics & Technology 物理-光学

CiteScore

5.70

自引率

12.10%

发文量

400

审稿时长

67 days

期刊介绍： The Journal covers the entire field of infrared physics and technology: theory, experiment, application, devices and instrumentation. Infrared'' is defined as covering the near, mid and far infrared (terahertz) regions from 0.75um (750nm) to 1mm (300GHz.) Submissions in the 300GHz to 100GHz region may be accepted at the editors discretion if their content is relevant to shorter wavelengths. Submissions must be primarily concerned with and directly relevant to this spectral region. Its core topics can be summarized as the generation, propagation and detection, of infrared radiation; the associated optics, materials and devices; and its use in all fields of science, industry, engineering and medicine. Infrared techniques occur in many different fields, notably spectroscopy and interferometry; material characterization and processing; atmospheric physics, astronomy and space research. Scientific aspects include lasers, quantum optics, quantum electronics, image processing and semiconductor physics. Some important applications are medical diagnostics and treatment, industrial inspection and environmental monitoring.