Chinese Optics Letters, 2011, 9 (6): 061405, Published Online: Apr. 28, 2011
Localized CO2 laser treatment and post-heating process to reduce the growth coef f icient of fused silica surface damage Download: 591次
Nd:YAG 激光 熔石英 损伤修复 损伤增长 CO2 激光 140.3330 Laser damage 160.6030 Silica 140.3390 Laser materials processing 140.3470 Lasers, carbon dioxide
Abstract
The lifetime of optical components in high-fluence ultraviolet (UV) laser applications is typically limited by laser-initiated damage and its subsequent growth. Using 10.6-μm CO2 laser pulses, we successfully mitigate 355-nm laser induced damage sites on fused silica surface with dimensions less than 200 \mu m. The damage threshold increases and the damage growth mitigates. However, the growth coefficients of new damage on the CO2 laser processed area are higher than those of the original sample. The damage grows with crack propagation for residual stress after CO2 laser irradiation. Furthermore, post-heating is beneficial to the release of residual stress and slows down the damage growth.
Shizhen Xu, Xiaotao Zu, Xiaodong Yuan. Localized CO2 laser treatment and post-heating process to reduce the growth coef f icient of fused silica surface damage[J]. Chinese Optics Letters, 2011, 9(6): 061405.