Laser-induced damage of multilayer dielectric gratings with picosecond laser pulses under vacuum and air

被引：10

作者：

Kong, Fanyu ^{[1
]}

Jin, Yunxia ^{[1
]}

Huang, Haopeng ^{[1
,2
]}

Zhang, Hong ^{[1
,2
]}

Liu, Shijie ^{[1
]}

He, Hongbo ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Key Lab Mat High Power Laser, Shanghai 201800, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

来源：

OPTICS AND LASER TECHNOLOGY | 2015年 / 73卷

基金：

中国国家自然科学基金;

关键词：

Multilayer dielectric gratings; Picosecond pulse damage; Vacuum damage; HIGH-EFFICIENCY; BROAD-BAND; THRESHOLD; NANOSECOND;

D O I：

10.1016/j.optlastec.2015.03.011

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this study, laser damage tests of multilayer dielectric gratings (MDGs) are performed in vacuum (5 x 10(-4) Pa) and in air at a wavelength of 1053 nm with pulse widths of 0.56 Ps similar to 9.7 ps. The laser-induced damage threshold (LIDT) of MDGs in vacuum/air ranges from 2.1/2.2 J/cm(2) to 4.4/4.8 J/cm(2) for laser beams of normal incidence. The LIDT of MDGs follows a tau(0.26) scaling in the pulse width regime considered. The typical damage morphologies in the two environments caused by the near threshold pulse were observed using a scanning electron microscope (SEM); the results indicate that the damage features of MDGs in vacuum are the same as those in air. The testing results reveal that a clean vacuum environment neither changes the laser damage mechanism nor lowers the LIDT of MDGs. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：39 / 43

页数：5

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