Results of experiments on stress-inhibited laser-driven crack growth and stress-delayed laser-damage initiation thresholds in fused silica, borosilicate glass (BK-7), and cleaved bulk silica are presented. A numerical model is developed to explain the crack arrest in fused silica. Good agreement is obtained between the model and a finite-element code. The crack arrest is demonstrated to be the result of the breaking of a hoop-stress symmetry that is responsible for crack propagation in fused silica.
© 1999 Optical Society of America
(140.3330) Lasers and laser optics : Laser damage
(140.3390) Lasers and laser optics : Laser materials processing
(140.3440) Lasers and laser optics : Laser-induced breakdown
(160.4670) Materials : Optical materials
(240.5770) Optics at surfaces : Roughness
Faiz Dahmani, John C. Lambropoulos, Ansgar W. Schmid, Semyon Papernov, and Stephen J. Burns, "Crack Arrest and Stress Dependence of Laser-Induced Surface Damage in Fused-Silica and Borosilicate Glass," Appl. Opt. 38, 6892-6903 (1999)