Thermal cracking of optical glass by strontium vapor laser

Investigations of controlled thermal cleavage of optical glass by the radiation of a strontium vapor laser have been carried out. It is shown that the high quality of the through separation of the display glass is determined by the multiwave spectrum of the absorbed radiation. Sr laser radiation (? = 6.45 ?m) absorbed in the "upper" layer ~ 200 ?m thick forms a surface microcrack, as in the case of using a CO ₂ laser (? = 10 , 6 ?m). In this case, radiation in the region of ~ 1 and 3 ?m forms a "bulk" microcrack. In total, this creates an additional effect, which makes it possible to increase the speed and quality of the through separation of optical glass in the repetitively pulsed regime at a relatively low average laser output power.