Local phase-structure modification inside of lithium silicate glass by combined double-wavelength laser action

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• 作者：M. M. Sergeev ; Y. A. Poltaev
• 关键词：Lithium disilicate ; Ultra ; short laser pulses ; Modification of structure ; Microcracks ; Phase transformations ; Crystallization
• 刊名：Optical and Quantum Electronics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：49
• 期：1
• 全文大小：
• 刊物主题：Optics, Lasers, Photonics, Optical Devices; Electrical Engineering; Characterization and Evaluation of Materials; Computer Communication Networks;
• 出版者：Springer US
• ISSN：1572-817X
• 卷排序：49

文摘

The process of local structure modification inside of lithium silicate glass under the combined laser action of two different wavelengths is considered. The first step is laser irradiation of ultrashort laser pulses with 532 nm wavelength, which is used to create of nucleation centers inside of the optically transparent glass. The crystallization of the structural modification areas was carried out by a photothermal action of CO₂ laser radiation with a 10.6 μm wavelength. The range of crystallization temperatures was defined and the kinetics of the phase transformations of the modified regions inside of the glass were studied. Duration of crystallization was about 10 min with a slow heating and 25 s at the fast heating to crystallization temperature.