基于周期极化LiTaO3晶体的高增益简并啁啾脉冲参量放大

根据准相位匹配理论计算了周期极化LiTaO3（PPLT）晶体中0类准相位匹配过程（e＋e→e）的增益曲线．在此基础上，使用数百心的低抽运能量获得了-10^6的增益和-10．3％的转换效率，实现了中心波长位于1064nm的基于简并光学啁啾脉冲参量放大（OPCPA）技术的高增益放大，为产生超短超强激光脉冲提供了新的技术手段．实验结果与理论预期基本符合．

The gain curve in periodically poled LiTaO3, crystal (PPLT) was calculated for type 0 (e + e -> e) quasi-phase matching (QPM). A high-gain amplifier centered at 1064 nm based on degenerated optical parametric chirped-pulse amplification was built. The gain of similar to 10(6) and similar to 10.3 % conversion efficiency were achieved with low pump energy of several hundreds of mu J. The experimental results are consistent with the simulation.