8 December 2004 Temperature dependence of laser-induced damage threshold of 355-nm Al2O3/MgF2 HR coatings
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Proceedings Volume 5774, Fifth International Conference on Thin Film Physics and Applications; (2004) https://doi.org/10.1117/12.608012
Event: Fifth International Conference on Thin Film Physics and Applications, 2004, Shanghai, China
Abstract
Laser-induced damage threshold (LIDT) of 355nm was a more severe problem than that of 1064nm. This work had been carried out to obtain high LIDT and high reflectance for Al2O3/MgF2 quarter wave multilayer stacks (35 layers). All the samples were deposited by electron beam evaporation using the same deposition process at different deposition temperatures. LIDT was measured by using a 355 nm Nd:YAG pulsed laser with a pulse width of 8 ns. It was found that deposition temperature had a fundamental effect on the thresholds of HR coatings. LIDT up to 18.5J/cm2 was achieved when the deposition temperature was 280°C. Transmittance and high reflectance of the samples were measured by Lambda 900 Spectrophotometer and the high reflectance of 98.7% was achieved. An absorption dominated model was proposed which met the results of damage thresholds.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Meiqiong Zhan, Meiqiong Zhan, Tianya Tan, Tianya Tan, Dawei Zhang, Dawei Zhang, Hongbo He, Hongbo He, Jianda Shao, Jianda Shao, Zhengxiu Fan, Zhengxiu Fan, } "Temperature dependence of laser-induced damage threshold of 355-nm Al2O3/MgF2 HR coatings", Proc. SPIE 5774, Fifth International Conference on Thin Film Physics and Applications, (8 December 2004); doi: 10.1117/12.608012; https://doi.org/10.1117/12.608012
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