带发散球面波照明的大角度、高均匀度衍射激光分束器

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2024-11-26 DOI:10.1016/j.optcom.2024.131355

Churan Han, Qiaofeng Tan

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引用次数: 0

摘要

分束角通常受限于衍射光学元件（DOE）的特征尺寸，是衍射激光分束器的重要指标之一。在这项研究中，我们利用发散球面波前入射实现了大角度、高均匀度的分束。为了设计这种衍射式分光器，我们修改了在 DOE 设计中广泛使用的 Gerchberg-Saxton (GS) 优化算法。同时，还提出了一种负反馈方法，以进一步改善实验中的均匀性，补偿入射波面的畸变。最后，我们使用了一个纯相位空间光调制器（SLM）来测试我们设计策略的可行性和适应性。在实验中，我们实现了几种分束器，其均匀度均优于 3.0%（均匀度以峰谷比（PV）衡量）。

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Large angle and high uniform diffractive laser beam splitter with divergent spherical wave illumination

Splitting angle, generally limited by the feature size of diffractive optical element (DOE), is one of the significant metrics of the diffractive laser beam splitter. In this study, we realize large angle and high uniform split beams by using a divergent spherical wave front incidence. For designing this diffractive beam splitter, the Gerchberg-Saxton (GS) optimization algorithm which is known as a widely used method in DOE design is modified. Meanwhile, a negative feedback method is proposed to further improve the uniformity in experiment to compensate the incident wavefront distortion. Finally, a phase-only spatial light modulator (SLM) was used to test the feasibility and adaptiveness of our design strategy. In the experiment, we achieved several kinds of beam splitters and the uniformities are all better than 3.0% which the uniformity is measured by the peak-to-valley (PV) ratio.

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.