自锁模固体激光器中的腔色散不共轴性

Cavity Dispersion Nonaxiality of Self Mode Locked Solid State Lasers

计算布儒斯特角切割的增益介质的色散引起的不同波长光波在谐振腔的振荡轴的不共轴性，其结果表明腔色散不共轴性的横向效应不亚于自聚焦效应，它对自锁模脉冲的产生和压缩有严重的影响。实验结果表明，无硬光阑钛宝石激光器的自锁模的最佳区域主要在共轴点附近，此时不同波长的振荡轴在介质内接近或完全重合。

The cavity dispersion nonaxiality (CDN) in a self mode locked solid state laser is calculated. It is shown that the transverse effect of CDN is not less than that of self focusing in most of the stability regions and seriously affects the generation and the compression of the self mode locking pulse. The experimental results prove that the self mode locked regime of a Ti∶sapphire laser without hard apertures is in the vicinity of the point where the cavity axes are coaxial in the gain medium.