Laser pretreatment parameters optimization of KDP crystal

被引：0
作者：
Wang F. [1 ]
Li Q. [1 ]
Guo D. [1 ]
Huang J. [1 ]
Geng F. [1 ]
机构：
[1] Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang
来源：
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | 2017年 / 46卷 / 03期
关键词：
Damage threshold; KKDP crystal; Laser pretreatment; Parameter optimization;
D O I：
10.3788/IRLA201746.0321005
中图分类号：
学科分类号：
摘要：
KDP crystal is the chief choice of frequency multiplier in high power laser system. Laser pretreatment is usually used to improve the damage probability of KDP element, the pretreatment process is more time-consuming, and it is of great significance to the engineering application to improve the pretreatment efficiency. KDP damage performance preconditioned by different laser pretreatment protocols was investigated, every protocol had three key parameters: laser radiation fluence, irradiated laser shots, and energy steps. By analyzing the condition parameters and the resultant damage performance, effect of every parameter on damage performance was discovered, and it is found that the same pretreatment performance can be achieved by using different energy steps, and laser pretreatment protocol was optimized by using variable energy steps instead of fixing one. Experimental results show that the variable energy steps protocol achieves total laser shots savings of 33%. The results would be benefit for KDP elements pretreatment process. © 2017, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
引用
收藏
相关论文
共 18 条
  • [1] Xu L., Peng Z., Sun Z., Et al., Damage online inspection technology of driver terminal optical elements, Infrared and Laser Engineering, 38, 4, pp. 721-724, (2009)
  • [2] Hu J., Ma P., Xu Q., Laser damage threshold measurement of the optical elements, Infrared and Laser Engineering, 35, 2, pp. 187-191, (2006)
  • [3] Wang Z., Research on gringding and dislocations of wafer, Infrared and Laser Engineering, 35, pp. 188-191, (2006)
  • [4] Shen H., Zhang Y., Zhu R., Mathematical model and structure parameters optimization of KDP crystal optical absorption coefficient measurement with interferometry method based on photothermal displacement principle, Infrared and Laser Engineering, 42, 12, pp. 3353-3357, (2013)
  • [5] Ni K., Liu S., Wu Z., Et al., Measurement of bulk defects for KDP crystal billet with focused line scanning, Optics and Precision Engineering, 24, 12, pp. 3020-3026, (2016)
  • [6] Guo X., Liu Z., Zheng G., Et al., Micro-mechanical behavior and machining property for tripler plane of KDP crystal, Optics and Precision Engineering, 24, 2, pp. 398-405, (2016)
  • [7] Adams J.J., Results of sub-nanosecond laser-conditioning of KD2PO4 crystals, SPIE, 6403, (2007)
  • [8] DeMange P., Negres R.A., A multidimensional investigation of laser conditioning in KDP and DKDP crystals, SPIE, 5991, (2005)
  • [9] Adams J.J., Weiland T.L., Stanley J.R., Pulse length dependence of laser cond itioning and bulk damage in KD2PO4, SPIE, 5647, pp. 265-278, (2004)
  • [10] Negres R.A., DeMange P., Demos S.G., Investigation of laser annealing parameters for optimal laser-damage performance in deuterated potassium dihydrogen phosphate, Optics Letters, 30, 20, pp. 2766-2768, (2005)
12