Measurements of laser-induced damage thresholds for KGSS 0180 neodymium glass surface

Dependences of energy damage thresholds on radiation parameters and geometry for KGSS 0180 phosphate neodymium glass have been studied. Laser induced damage threshold dependences on the pulse duration for the range of 1.5-20 ns for KGCC 0180 and K8 glasses are: epsilon(kgss) = 16 center dot tau(1/2) [sic] epsilon(K8) = 18 center dot tau(1/2)(Jcm(2), when tau in nanoseconds). Damage thresholds for the entrance and exit surfaces of KGSS 0 180 glass samples have been measured when the samples were irradiated by a P-polarized beam at Brewster's angle: epsilon(ent) approximate to 48 J/cm(2); epsilon(ent) approximate to 31 J/cm(2). It has also been found out that the threshold energy density of the beam in case of Brewster's incidence to the exit surface of the sample is almost 1.5 times lower than in the case of a normal incidence. At the same time the relation is reverse for the entrance surface of the glass KGSS 0180 sample with the same radiation polarization.