中国物理B ›› 2019, Vol. 28 ›› Issue (8): 85202-085202.doi: 10.1088/1674-1056/28/8/085202

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇    下一篇

Damage characteristics of laser plasma shock wave on rear surface of fused silica glass

Xiong Shen(沈雄), Guo-Ying Feng(冯国英), Sheng Jing(景晟), Jing-Hua Han(韩敬华), Ya-Guo Li(李亚国), Kai Liu(刘锴)   

  1. 1 College of Electronics and Information Engineering, Sichuan University, Chengdu 610064, China;
    2 Sichuan Earthquake Administration, Chengdu 610041, China;
    3 Fine Optical Engineering Research Center, Chengdu 610041, China
  • 收稿日期:2019-04-22 修回日期:2019-06-09 出版日期:2019-08-05 发布日期:2019-08-05
  • 通讯作者: Jing-Hua Han E-mail:hanjinghua@scu.edu.cn
  • 基金资助:
    Project supported by the Key Research and Development Projects of Science and Technology Department of Sichuan Province, China (Grant No. 2018FZ0032) and the National Natural Science Foundation of China (Grant No. U1730141).

Damage characteristics of laser plasma shock wave on rear surface of fused silica glass

Xiong Shen(沈雄)1, Guo-Ying Feng(冯国英)1, Sheng Jing(景晟)2, Jing-Hua Han(韩敬华)1, Ya-Guo Li(李亚国)3, Kai Liu(刘锴)1   

  1. 1 College of Electronics and Information Engineering, Sichuan University, Chengdu 610064, China;
    2 Sichuan Earthquake Administration, Chengdu 610041, China;
    3 Fine Optical Engineering Research Center, Chengdu 610041, China
  • Received:2019-04-22 Revised:2019-06-09 Online:2019-08-05 Published:2019-08-05
  • Contact: Jing-Hua Han E-mail:hanjinghua@scu.edu.cn
  • Supported by:
    Project supported by the Key Research and Development Projects of Science and Technology Department of Sichuan Province, China (Grant No. 2018FZ0032) and the National Natural Science Foundation of China (Grant No. U1730141).

摘要: The damage to the rear surface of fused silica under the action of high power laser is more severe than that incurred by the front surface, which hinders the improvement in the energy of the high power laser device. For optical components, the ionization breakdown by laser is a main factor causing damage, particularly with laser plasma shock waves, which can cause large-scale fracture damage in fused silica. In this study, the damage morphology is experimentally investigated, and the characteristics of the damage point are obtained. In the theoretical study, the coupling and transmission of the shock wave in glass are investigated based on the finite element method. Thus, both the magnitude and the orientation of stress are obtained. The damage mechanism of the glass can be explained based on the fracture characteristics of glass under different stresses and also on the variation of the damage zone's Raman spectrum. In addition, the influence of the glass thickness on the damage morphology is investigated. The results obtained in this study can be used as a reference in understanding the characteristics and mechanism of damage characteristics induced by laser plasma shock waves.

关键词: rear surface of fused silica, laser-induced plasma, Raman spectroscopy, different thickness, finite element method

Abstract: The damage to the rear surface of fused silica under the action of high power laser is more severe than that incurred by the front surface, which hinders the improvement in the energy of the high power laser device. For optical components, the ionization breakdown by laser is a main factor causing damage, particularly with laser plasma shock waves, which can cause large-scale fracture damage in fused silica. In this study, the damage morphology is experimentally investigated, and the characteristics of the damage point are obtained. In the theoretical study, the coupling and transmission of the shock wave in glass are investigated based on the finite element method. Thus, both the magnitude and the orientation of stress are obtained. The damage mechanism of the glass can be explained based on the fracture characteristics of glass under different stresses and also on the variation of the damage zone's Raman spectrum. In addition, the influence of the glass thickness on the damage morphology is investigated. The results obtained in this study can be used as a reference in understanding the characteristics and mechanism of damage characteristics induced by laser plasma shock waves.

Key words: rear surface of fused silica, laser-induced plasma, Raman spectroscopy, different thickness, finite element method

中图分类号:  (Plasma production and heating by shock waves and compression)

  • 52.50.Lp
78.30.-j (Infrared and Raman spectra) 42.70.-a (Optical materials)