Abstract
Experiments on local modification of lithium-borogermanate (LBG) glass with the composition (molar fraction, %) 25Li2 O ∙ 25B2O3 ∙ 50GeO by copper-vapor laser radiation on the main lasing lines (510.6 and 578.2 nm) in the visible range and on the sum frequency in the UV range (271 nm) are described. Local surface crystallization of LBG glass by a laser beam with 2 – 15 μm crystals precipitated by means of laser heating of the sample at temperature somewhat below t g is demonstrated for the first time. X-ray phase analysis and confocal RS spectroscopy show that the polar phase LiBGeO4 is the only phase formed as a result of crystallization. Crystallization obtains with UV- and visible-range radiation.
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