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Proceedings Paper

Temperature dependence of laser-induced damage threshold of 355-nm Al2O3/MgF2 HR coatings
Author(s): Meiqiong Zhan; Tianya Tan; Dawei Zhang; Hongbo He; Jianda Shao; Zhengxiu Fan
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Paper 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.

Paper Details

Date Published: 8 December 2004
PDF: 4 pages
Proc. SPIE 5774, Fifth International Conference on Thin Film Physics and Applications, (8 December 2004); doi: 10.1117/12.608012
Show Author Affiliations
Meiqiong Zhan, Shanghai Institute of Optics and Fine Mechanics, CAS (China)
Tianya Tan, Shanghai Institute of Optics and Fine Mechanics, CAS (China)
Dawei Zhang, Shanghai Institute of Optics and Fine Mechanics, CAS (China)
Hongbo He, Shanghai Institute of Optics and Fine Mechanics, CAS (China)
Jianda Shao, Shanghai Institute of Optics and Fine Mechanics, CAS (China)
Zhengxiu Fan, Shanghai Institute of Optics and Fine Mechanics, CAS (China)


Published in SPIE Proceedings Vol. 5774:
Fifth International Conference on Thin Film Physics and Applications

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