Laser damage properties of broadband low-dispersion mirrors in sub-nanosecond laser pulse

被引：11
|
作者：
Zhang, Jinlong [1 ,2 ,3 ]
Bu, Xiaoqing [1 ,2 ]
Jiao, Hongfei [1 ,2 ]
Ma, Bin [1 ,2 ]
Cheng, Xinbin [1 ,2 ,3 ]
Wang, Zhangshan [1 ,2 ,3 ]
机构：
[1] MOE Key Lab Adv Microstruct Mat, Shanghai 200092, Peoples R China
[2] Tongji Univ, Inst Precis Opt Engn, Sch Phys Sci & Engn, Shanghai 200092, Peoples R China
[3] Shanghai Jiao Tong Univ, IFSA Collaborat Innovat Ctr, Shanghai 200240, Peoples R China
来源：
OPTICS EXPRESS | 2017年 / 25卷 / 01期
基金：
中国国家自然科学基金;
关键词：
NODULAR DEFECTS; HIGH-REFLECTION; ELECTRIC-FIELD; COATINGS; BANDWIDTH; RESISTANT;
D O I：
10.1364/OE.25.000305
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Broadband low dispersion (BBLD) mirrors are an essential component in femtosecond (fs) pulse laser systems. We designed and produced Ta2O5-HfO2/SiO2 composite quarter-wave and non-quarter-wave HfO2/SiO2 BBLD mirrors for the 30fs petawatt laser system. The laser damage properties of the BBLD mirrors were investigated in an uncompressed sub-nanosecond laser pulse. It showed that the Ta2O5-HfO2/SiO2 composite BBLD mirror possessed higher LIDT due to the low electric-field intensity (EFI) in the case of the coating without artificial nodules. Nevertheless, the LIDT of the composite mirror was significantly lower than the non-quarter-wave HfO2/SiO2 mirror when the nodules exist. The EFI simulation and damage morphology of the nodules analysis demonstrated that the nodule leading to the light intensification in the middle of the boundary between the nodular and the surrounding coating, thus the outermost HfO2/SiO2 layers cannot protect the Ta2O5/SiO2 layers, and resulting to the significantly low LIDT. This study shed some light on the development of high-laser-damage BBLD mirrors for pulse compression laser systems. (C) 2017 Optical Society of America
引用
收藏
页码：305 / 312
页数：8
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