The particulars of the action of a femtosecond laser beam on antimony-containing lithium-aluminum-silicate glass and the close to zero CLTE sitall obtained from this glass by heat-treatment were studied in a wide temperature range. In both the non-thermal and thermal laser action regimes local refractive index reduction is demonstrated in the laser modified regions of the sitall, reaching 0.002 in the non-thermal regime. The main reason for refractive index reduction is, by all appearances, partial amorphization of the crystal phase of β-eucryptite.

中文翻译：

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飞秒激光改性含锑铝硅酸盐玻璃及其制备的透明筛

飞秒激光束对含锑的锂铝硅酸盐玻璃和通过热处理从该玻璃获得的接近零的CLTE壁垒的作用的细节已在较宽的温度范围内进行了研究。在非热和热激光作用方式下，在机舱的激光修改区域均显示出局部折射率降低，在非热方式下达到0.002。从所有方面来看，降低折射率的主要原因是β-锂霞石的结晶相部分非晶化。