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arXiv 1805.02191physics.optics
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飞秒laser波长对熔融石英波导制备的影响

The influence of femtosecond laser wavelength on waveguide fabrication inside fused silica

Javier Hernandez-Rueda, Jasper Clarijs, Dries van Oosten, Denise M. Krol

摘要:

我们研究了激光波长对熔融石英内激光直写制备光波导和改性材料径迹的影响。激光刻写轨道的大小,材料的修改阈值,结构的变化,和波导写入能量范围显示出强烈的依赖于激光波长范围从紫外到近红外。我们使用了考虑激光激发电子等离子体动力学(通过多速率方程)的数值模拟以及高斯光束理论来计算激光影响体积的大小,并将其与实验结果进行了进一步比较。这项研究深入了解如何预测和设计激光刻写线的空间特征,也有助于理解使用不同激光波长时与激光-玻璃相互作用相关的潜在物理机制。

英文摘要:

We have investigated the effect of the laser wavelength on the fabrication of optical waveguides and tracks of modified material via direct laser writing inside fused silica. The size of the laserinscribed tracks, the material modification thresholds, the structural changes, and the waveguide writing energy range show a strong dependence on laser wavelengths ranging from ultraviolet to near-infrared. We used numerical simulations that consider the laser-excited electron plasma dynamics (via multiple rate equations) along with Gaussian beams theory to calculate the size of the laser-affected volume that has been further compared with the experimental results. This study yields insight into how to predict and design the spatial features of laser-inscribed lines and also aids of understanding the underlying physical mechanisms linked to laser-glass interaction when using different laser wavelengths.

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