Appendix Investigation of Damages in Laser Glasses
Experiments on laser glass damages were performed to clarify the damage mechanisms and to obtain the informations of the most preferable glass to a high power laser system. As for the testing method, passive and active tests were adopted by multi and single mode lasers. The plasma formations were always observed in internal and surface fractures. To investigate the plasma behavior, time resolved photographic and spectroscopic methods were used. The damage threshold on entrance surface was larger than exit one. The mechanism of fracture in glass laser seems to be due to the plasma formation by light which produces a shock wave to cause a cleavage in glass.
If one produces glass carefully without Pt inclusion, the damage threshold is mainly determined on surface. In this trend, the improvement of surface damage threshold becomes very important for the practical use.
KeywordsShock Wave Damage Threshold Plasma Formation Laser Glass Entrance Surface
Unable to display preview. Download preview PDF.
- 1.C. Yamanaka et al, IQEC 20-3, 404 (1970), Conf. on damage of laser materials, Boulder (l971).Google Scholar