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首页> 外文期刊>Optics Letters >Control of the cross-sectional shape of a hollow microchannel embedded in photostructurable glass by use of a femtosecond laser
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Control of the cross-sectional shape of a hollow microchannel embedded in photostructurable glass by use of a femtosecond laser

机译：飞秒激光控制可光化玻璃中嵌入的中空微通道的横截面形状

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摘要

Theoretical and experimental investigations have been made of the three-dimensional microchannel fabrication of photostructurable glass by use of a femtosecond (fs) laser. Generally, a microchannel fabricated inside glass by the scanning focal spot of a fs laser perpendicular to the direction of laser propagation assumes an elliptical shape with a cross section of large aspect ratio. We demonstrate that one can greatly reduce the aspect ratio merely by inserting a slit, which is oriented parallel to the laser's scanning direction, before the focusing lens. Computer simulations show that a more symmetrical pattern is obtained in the vicinity of the focal point with the help of such a slit, owing essentially to a diffraction effect.
机译：已经通过使用飞秒（fs）激光对可光结构化玻璃的三维微通道制造进行了理论和实验研究。通常，通过垂直于激光传播方向的fs激光器的扫描焦点在玻璃内部制造的微通道呈现出具有大的长径比的横截面的椭圆形。我们证明，只要在聚焦透镜之前插入一条平行于激光扫描方向的狭缝，就可以大大降低纵横比。计算机模拟表明，借助于这种缝隙，由于衍射效应，在焦点附近获得了更对称的图案。

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