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扩展焦点深度的秒激光脉冲用于灵活的微加工

Aditya Narayana Jena, Tina M Hayward, Anita Kumari

|August 2, 2025

概括

我们开发了一种简单的多层衍射镜头 (MDL),以扩展强烈的五秒 (fs) 激光脉冲的焦点深度. 这一创新使得在扩展范围的激光微加工能够保持一致,改善了微光学和纳米外科的应用.

科学领域:

光学和光子学在光学和光子学.
激光物理激光物理

背景情况:

传统的光学系统具有有限的焦点深度,限制了需要在长距离范围内精确激光操纵的应用.
五秒 (fs) 激光脉冲提供高精度,但受到浅焦深的限制.

研究的目的:

引入一种新的方法来延长强烈的fs脉冲的焦点深度 (EDOF).
为了证明这种EDOF方法在激光材料加工中的实际实用性.

主要方法:

设计和制造一个平坦,薄的多层衍射透镜 (MDL).
对fs脉冲聚焦和通过MDL传播的特征.
评估激光光纤和材料处理的扩大焦点深度.

主要成果:

MDL成功地将fs脉冲的焦点深度扩展到传统镜头之外.
在激光标记和玻璃加工过程中,在延长的焦点深度上实现了一致的空间分辨率.
通过长等离子体通道展示了激光线.

结论:

开发的MDL提供了一个简单而有效的解决方案,用于扩展fs脉冲的焦点深度.
这项技术可实现高吞吐量,紧的在线fs微加工.
潜在的应用包括微光学制造,微流体学和纳米手术.

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