聚焦laser光束的灵活、快速和基准矢量模型
A flexible, fast and benchmarked vectorial model for focused laser beams
摘要:
在过去的几十年里,通过激光辐射对材料进行批量加工已经有了很大的发展,并且仍然开辟了新的科学和工业潜力。任何批量加工应用的开发都依赖于激光传播的知识,特别是焦点附近的体积场分布。许多商业程序可以模拟这一点,但是,为了适应它们,或者开发新的方法,通常需要创建特定的软件。除此之外,人们还需要测量焦点附近的实际场分布,以评估他们在模拟中的假设.为了方便地获得这些知识,我们提出了我们的高精度场分布测量方法,并在知识共享4.0许可下发布了我们的内部软件InFocus。我们的测量提供300纳米的纵向分辨率和衍射限制的横向分辨率。内部软件允许快速矢量分析的集中体积场分布在散装。对不同条件下(聚焦光学、波长、空间形状、传播介质)光传输的模拟结果与传输成像实验结果吻合较好。该模型考虑了折射率失配引起的像差和聚焦光学系统引起的像差,计算结果表明,该模型可以用于精确计算能量沉积
英文摘要:
In-bulk processing of materials by laser radiation has largely evolved over the last decades and still opensup new scientific and industrial potentials. The development of any in-bulk processing application relieson the knowledge of laser propagation and especially the volumetric field distribution near the focus.Many commercial programs can simulate this, but, in order to adapt them, or to develop new methods,one usually needs to create a specific software. Besides, most of the time people also need to measurethe actual field distribution near the focus to evaluate their assumptions in the simulation. To easily get access to this knowledge, we present our high-precision field distribution measuring method and release our in-house software InFocus, under the Creative Commons 4.0 License. Our measurementsprovide 300-nm longitudinal resolution and diffraction limited lateral resolution. The in-house softwareallows fast vectorial analysis of the focused volumetric field distribution in the bulk. The simulationsof light propagation under different conditions (focusing optics, wavelength, spatial shape, propagationmedium) are in excellent agreement with propagation imaging experiments. The aberrations provoked by the refractive index mismatch as well as those induced by the focusing optics are both taken into account.The results indicate that our proposed model is suitable for the precise evaluation of energy deposition
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