CO₂ laser with 10.6μm wavelength radiate on damage with size below 80μm. Through examining with 351nm wavelength ultra-violet, it is found the larger damage size is, the lower extent of damage threshold is enhanced. During mitigation, thermal stress resulted from short interaction time and asymmetrical temperature distribution. Radial crack generates after damage and could expand if exposed to ultraviolet laser. After annealed in an oven for 9 hours, crack in the sample was eliminated.

Date Published: 6 October 2010
PDF: 7 pages
Proc. SPIE 7655, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 765533 (6 October 2010); doi: 10.1117/12.869088

Published in SPIE Proceedings Vol. 7655:
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Li Yang; Yoshiharu Namba; David D. Walker; Shengyi Li, Editor(s)