外文题目: Laser conditioning mechanism revealed by defect and absorption variation in the bulk and at the surface of KDP/DKDP crystals
作者: Hu, Guohang; Zhao, Yuanan; Li, Dawei; Liu, Xiaofeng; Zhu, Meiping; Shao, Jianda
刊名: Proc.SPIE
来源图书: LASER-INDUCED DAMAGE IN OPTICAL MATERIALS 2016
年: 2016 卷: 10014 文章编号：100140M
会议名称: 48th SPIE Annual Laser Damage Symposium on Optical Materials for High-Power Lasers
英文关键词:
laser conditioning; bulk; surface; scattering defect; absorption
POTASSIUM DIHYDROGEN PHOSPHATE; DAMAGE-THRESHOLD; DKDP CRYSTALS; KH2PO4
英文摘要:
Previous works proved that laser conditioning process was able to improve laser induced damage thresholds (LIDTs) in the bulk of KDP/DKDP crystals. In this paper, it's also demonstrated that laser conditioning process was an effective method to improve LIDTs at their surface. The variation of scattering defects and absorption in the bulk of DKDP crystals during laser pre-exposure was investigated by combining light scattering technique and on-line transmittance measurement technique. Laser-induced disappearance of scattering defects and decrease of absorption revealed the mitigation process of laser damage initiators in the bulk of KDP/DKDP crystals. At the surface of KDP/DKDP crystals, most of damage initiators were the invisible defects. Laser conditioning process could mitigate the invisible defects, but it's hard to mitigate the indentation with fractures. Therefore, it's admitted that laser conditioning process could help to improve the optical properties of crystal material, but it's hard to improve the properties of optical finishing.


文献类型: 会议论文
正文语种: English
收录类别: ISTP
DOI: 10.1117/12.2245003


全文传递服务