高重复频率高效率光参量啁啾脉冲放大研究

High-repetition-rate and high-conversion-efficiency in optical parametric chirped-pulse amplification system

摘要: 准相位匹配晶体在光参量放大过程具有更大的有效非线性系数，数值分析显示在光参量前级放大过程中就能够提供6.2×106的高增益饱和放大，参量转换效率大于25％，并基于准相位匹配的参量增益特性给出了一个全二极管激光器泵浦的亚TW级高重复频率OPCPA系统的优化设计。

Abstract: Great nonlinear coefficients of quasi-phase-matching crystals may be used in optical parametric chirped-pulse amplification (OPCPA) system. This is particularly true for the applications that require high repetition rates and small pump energies. The numerical simulations show that a saturatiom amplificatiom gain of above 6.2×106 and over 25% pump-to-signal conversion efficiency can be obtained with a periodically poled crystal in the first stage of the optical parametric amplification. A high repetition rate and sub-terawatt OPCPA laser system with diode-laser pumping was discussed．