分段波束整形积分器镜的设计、仿真和实验验证。

Applied optics Pub Date : 2025-09-20 DOI:10.1364/AO.569901
Lei Feng, Jingxing Liao, Jingna Yang
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引用次数: 0

摘要

实现均匀的强度分布是各种激光应用如材料加工的必要条件。本文介绍了一种分段光束整形积分镜的设计、仿真和实验验证,该积分镜旨在将入射激光束转换成均匀的线状光斑。镜面由多个连通的抛物线段组成。基于输入规格,包括工作距离(f)、输入孔径大小(D)、目标光斑大小(D)和段数(s),开发了一种使用Python代码实现的几何光学计算方法,以确定每个段的唯一参数和边界。针对D=49.5mm, f=350mm, D= 20mm, s=7的设计工况,计算分段参数。在SolidWorks中对计算出的设计进行了建模,并使用Zemax射线跟踪对其性能进行了模拟,预测了在分割方向上与20mm目标尺寸密切匹配的形状点和期望尺寸(约为20mm)。1.4 mm)。实验验证采用4 kW光纤激光器,光纤芯直径400µm,数值孔径0.15,准直透镜焦距100 mm。目标平面实测光斑尺寸为20.39mm×1.41mm (1/e2宽度),与设计规范和仿真结果吻合良好。这项工作成功地证明了积分器反射镜设计方法和制造工艺在高功率激光系统中创建高性能光束整形积分器光学器件的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Design, simulation, and experimental validation of a segmented beam-shaping integrator mirror.

Achieving uniform intensity distribution is essential for various laser applications such as material processing. This paper presents the design, simulation, and experimental validation of a segmented beam-shaping integrator mirror aimed at transforming an incident laser beam into a uniform line-shaped spot. The mirror surface is composed of multiple connected parabolic segments. A geometric optics computational method, implemented using Python code, was developed to determine the unique parameters and boundaries for each segment, based on input specifications including the working distance (f), the input aperture size (D), the target spot size (d), and the number of segments (s). For a design case with D=49.5mm, f=350mm, d=20mm, and s=7, the segment parameters were calculated. The calculated design was modeled in SolidWorks, and its performance was simulated using Zemax ray tracing, predicting a shaped spot closely matching the 20 mm target size in the segmented direction and an expected size (approx. 1.4 mm) in the orthogonal direction. Experimental validation was conducted using a 4 kW fiber laser equipped with a fiber core diameter of 400 µm and a numerical aperture of 0.15, along with a collimating lens with a 100 mm focal length. The measured spot size at the target plane was 20.39mm×1.41mm (1/e2 width), showing excellent agreement with both the design specification and the simulation results. This work successfully demonstrates the effectiveness of the integrator mirror design method and fabrication process for creating high-performance beam-shaping integrator optics for high-power laser systems.

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