【摘要】 为了改进 KTP 晶体倍频增透膜的镀膜质量,采用 SiO₂代替原来使用的 MgF₂材料作外层膜并重新设计了膜系。实验结果表明,运用上述技术将镀有1064nm 和532nm 增透膜的 KTP 倍频晶体应用在高功率 Nd:YAG 激光器中,当重复频率 lkHz、脉宽25ns、基波功率密度高达450MW/cm²时,没有观察到 KTP 晶体表面激光损伤,膜层表面抗激光损伤和光学性能都得到提高。更多还原

【Abstract】 By redesigning the film with substituting SiO₂ instead of MgF₂ as the outer layer film,the frequency doubling antireflection coating on the KTP crystal is improved.After the KTP crystal with 1064nm and 532nm antireflection coating is applied in high power Q-switched Nd:YAG laser,any surface damage have not been observed even at intensity as high as 450MW/cm² at a pulse repetition rate of 1 kHz and 25ns of pulse duration.The experimental results show that both the surface quality and the optical property of the film have been improved.更多还原