对两种ＮｄＹＶＯ４晶体的内腔倍频特性进行了研究和实验对比，Ⅱ号晶体的倍频效率比Ⅰ号晶体提高一倍，斜率效率达到３１％。此外，用１Ｗ国产半导体二极管泵浦一块浓度２％的晶体，其最高输出绿光达１０８ｍＷ，降低输入泵浦功率，单频绿光功率大于１０ｍＷ。 The inner frequency doubling characteristics of two kinds of NdYVO4 crystals were studied and compared. The frequency doubling efficiency of No. 2 crystal doubles that of No. 1 crystal, and the slope efficiency reaches 31%. In addition, 1W domestic semiconductor diode pumped a concentration of 2% of the crystal, the maximum output of green 108mW, reduce the input pump power, single-frequency green power is greater than 10mW.