Femtosecond pulse laser radiation (250 fs, 1030 nm) of alkali and alkaline earth modified soda‐lime silicate (SLS) glasses resulted in densification. The degree of density changes depends on pulse energy and glass‐network connectivity. Raman spectroscopy study of the high‐frequency region (800‐1200 cm⁻¹) confirmed that surface densification was the result of interatomic changes in the distribution of silicon‐nonbridging oxygen (NBO) bond lengths and Si‐O‐Si bond angle distribution (BAD). Modifier valency contributes to structural rigidity and the degree of disorder a glass can incur during the deposition of high‐energy laser pulses. Varying soda content caused larger shift in the laser modified Q³ band position and width compared to the calcium modified system. Increasing laser fluence was found to affect the position of Q³ Si‐O stretching mode as well as the band width, indicating the increased degree of disorder laser pulses induce. These results underscore the role of modifier ions in the laser‐induced densification of the SLS glasses.

中文翻译：

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飞秒脉冲激光对钠钙硅酸盐玻璃的结构改造

飞秒脉冲激光辐射（250 fs，1030 nm）的碱金属和碱土改性的钠钙硅酸盐（SLS）玻璃导致致密化。密度变化的程度取决于脉冲能量和玻璃网络的连通性。对高频区域（800-1200 cm ^-1）的拉曼光谱研究证实，表面致密化是硅-非桥连氧（NBO）键长分布和Si-O-Si键角分布的原子间变化的结果（坏）。修饰剂的化合价有助于提高结构刚度，以及玻璃在高能激光脉冲沉积过程中可能引起的无序程度。苏打含量的变化会导致激光改性Q ³发生较大的偏移带的位置和宽度与钙改性系统相比。发现增加的激光能量密度会影响Q ³ Si-O拉伸模式的位置以及带宽，这表明激光脉冲引起的无序度增加。这些结果强调了改性剂离子在SLS玻璃的激光致密化中的作用。