KrF-excimer laser irradiation on the soda-lime silicate glass

Defects induced by KrF-excimer laser irradiation in the soda-lime silicate glass were studied by means of optical spectrophotometric and electron spin resonance measurements. Three induced absorption bands at peak position of 610, 420, and 275 nm were determined in the glass after the UV-laser radiation, with the assistance of Gaussian resolution method. The defects of nonbridging oxygen hole centers attributed to two absorption peaks at 610 and 420 nm, and the trapped electrons correlated to the absorption at 275 nm. The induced absorption bands increased when laser irradiation time or energy density increased.