Using a pico-second laser pulse generated by a convex-ARR unstable resonator Nd:YAG laser to study the SHG of the KTP and BBO crystals. The influence of KTP gray tracking on the SH conversion efficiencies is analyzed.

• 本文利用凸 -ARR非稳腔产生的皮秒光脉冲比较和研究了KTP和BBO晶体的倍频转换效率 ,分析KTP灰迹形成对转换效率的影响。