为提高1342 nm 波段全固态连续单频Nd∶GdVO₄红外激光器的输出功率，本文选用复合式Nd∶GdVO₄ 晶体为激光介质，并对其相关参数进行优化，以提高激光输出功率。研究表明，热致衍射损耗正比于激光介质横截面尺寸，热损伤阈值抽运功率随横截面尺寸的减小而增加。通过环形腔选模的方法实现激光器单频运转，并选用横截面尺寸较小的激光晶体。实验证明，1342 nm 激光最大输出功率为3.1 W，较前期激光器输出功率提高30%。

To scale the output power of all- solid- state continuous- wave Nd∶GdVO₄ laser of single- frequency operation at 1342 nm, the composite Nd∶GdVO₄ laser crystal is used as laser medium, and its relevant parameter is optimized. The theoretical calculation shows that the thermally induced diffraction losses is proportional to the cross- section dimension of laser medium, and the pump power of thermal fracture limit is the decreasing function of it. A ring laser resonator is designed to make the laser single-frequency operation. The experimental result shows that the maximum output power is 3.1 W, and the conversion efficiency increases by 30%.