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提出应用级联倍频方法提高倍频系统输出稳定性,并就该方法的有效性进行了理论分析和模拟计算.分析和计算结果不但证明级联倍频方法能实现倍频系统稳定输出,而且还表明可以通过仔细调节第一块倍频晶体中波矢方向k与光轴间夹角、两块倍频晶体间的间隔,能调节改变实现倍频系统最稳输出时所需第二块晶体的理论计算长度,使之与第二块倍频晶体的实际加工长度一致,最终实现系统稳定倍频输出.级联倍频方法在实现高输出稳定性的同时能实现高的倍频转换效率,对应用于光参量啁啾脉冲放大系统的高稳定抽运源系统的设计建造具有重要参考意义.
The cascade multiplication method is proposed to improve the output stability of multiplier system, and the theoretical analysis and simulation calculation are carried out on the validity of the method.The analysis and calculation results not only prove that the cascade multiplication method can achieve the stable output of multiplier system, Also shows that by carefully adjusting the first frequency doubled crystal wave vector direction k and the angle between the optical axis, the interval between the two frequency doubling crystals can be adjusted to change the frequency of the system to achieve the most stable output of the second crystal Of the theoretical length of the second harmonic and make it the same length of the actual processing, the final realization of the system frequency doubled output cascaded double-frequency method to achieve high output stability while achieving high frequency conversion efficiency, It has important reference significance for the design and construction of high stability pumping source system for optical parametric chirped pulse amplification system.