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从理论上和实验上，将一声光驻波调制器插入纯被动锁模ＹＡＧ激光谐振腔内，使其特性显著地改进，即锁模几率达到百分之百，锁模阈值明显地降低，锁模脉冲列的稳定性显然提高。并用雪崩晶体管串供Ｐｏｃｋｅｌ盒选取单脉冲用的高压方波。在此基础上，再经两级激光放大及二、三倍频谐波发生器，研制出一台高稳定度高功率密度主被动锁模ＹＡＧ激光器的超短激光脉冲光源
Theoretically and experimentally, an acousto-optic standing wave modulator is inserted into a purely passive mode-locked YAG laser resonator, which improves its characteristics remarkably, that is, the clamping mode probability reaches 100%, the mode-locking threshold decreases obviously, and the mode-locked pulse train The stability is obviously improved. And use the avalanche transistor string for Pockel boxes to select the single-pulse high-voltage square wave. On this basis, an ultrashort laser pulsed light source with high stability, high power density and active-mode-locked YAG laser was developed by two stages of laser amplification and two and three times harmonic generator