In this paper,we give an analytical expression of second-and third-order dispersions for three-element cavity.The variations of the second- and third-order dispersions owing to the changing of Ti:Al2O3 crystal and prismatic output coupler are calculated.The results provide a theoretical basis for the design of three-element cavity.%给出在任意角度切割情况下,三元腔固体自锁模激光器二阶、三阶色散的解析表示,并系统地计算了切割角度、材料等因素的变化对二阶、三阶色散的影响.该计算为三元腔固体自锁模激光器的设计提供了理论依据.
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