通过对 Nd:YVO4 晶体吸收特性的研究 ,对激光输出功率、斜效率与抽运功率的关系进行了理论分析 ,发现 Nd:YVO4 激光器在大功率激光二极管抽运的条件下 ,激光斜效率随抽运功率的增加而减小 ,实验表明 ,理论结果与实验符合得较好。选用 Nd3 + 掺杂的原子数分数为 0 .5%、通光长度为 5mm的 Nd:YVO4 晶体 ,在抽运功率为 5W左右时 ,输出功率为 3W左右时 ,获得了 71.5%的激光斜效率。 Through the study on the absorption characteristics of Nd: YVO4 crystal, the relationship between laser output power, slope efficiency and pumping power has been analyzed theoretically. It is found that under the condition of high power laser diode pumping Nd: YVO4 laser, The experimental results show that the theoretical results are in good agreement with the experiments. The Nd3 + doped Nd3 + and Nd5 + -doped Nd: YVO4 crystal with Nd3 + -doped atomic number of 71.5% were obtained when the output power was about 3W at a pumping power of about 5W .