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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：９００ ｎｍ和 ４５０ ｎｍ处，腔内倍频的ＢＢＯ晶体的位置调整范围为 ９．４ ｍｍ．
In this paper, the influence of the position of the BBO crystal cavity due to dispersion on the frequency doubling frequency output of the Cr: LiSAF laser was experimentally studied, and the best position of the BBO crystal with the double frequency doubling is theoretically obtained as the fundamental harmonic The phase difference between the two waves is an integer multiple of 2π. At the same time, taking into account that the allowable difference between the fundamental and the harmonics is ± π / 4, the corresponding fundamental and harmonic wavelengths are respectively 900 nm and 450 nm, The frequency of the BBO crystal position adjustment range of 9.4 mm.