晶体石英置于Ｈｅ－Ｎｅ激光谐振腔中，由于双折射效应，会产生激光频率分裂。本文报道了频率分裂量与光线光轴夹角的非线性关系及对此现象的研究，实验结果表明频率分裂曲线与石英族光性曲线有对应关系，即旋光性是一个影响频率分裂的因素。 Crystalline quartz is placed in a He-Ne laser cavity and splits the laser frequency due to birefringence. This paper reports the nonlinear relationship between the frequency splitting quantity and the included angle of the optical axis and the research of this phenomenon. The experimental results show that the frequency splitting curve has a corresponding relationship with the quartz curve, that is, the optical rotation is a factor that affects the frequency splitting.