本文实验研究了由于色散引起的BBO晶体腔内位置对灯泵Cr：LiSAF激光器腔内倍频输出的影响，并从理论上获得了腔内倍频的BBO晶体的最佳位置为基波与谐波的位相差2π的整数倍，同时，考虑到容许的基波与谐波的位相差为±π／4时，对应基波和谐波波长分别为：900nm和450 nm处，腔内倍频的BBO晶体的位置调整范围为9．4 mm．
The location of BBO crystal in the cavity effecting the output energy in the intracavity frequency-doubling of a flashlamp-pumped Cr:LiSAF laser is researched.The benefit net phase shift due to dispersion between the fundamental and the harmonic wave beam in the air path between BBO crystal and the mirror M3 is a multiple of 2π. If the net phase shift ofπ/4 is allowed, this requires a BBO crystal movement of no more than 9.4 mm at the fundamental wave of 900 nm and the harmonic wave of 450 nm.
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