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为提高1342 nm波段全固态连续单频Nd∶Gd VO4红外激光器的输出功率,本文选用复合式Nd∶Gd VO4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%。
In order to improve the output power of 1342 nm all-solid-state continuous single-frequency Nd: Gd VO4 infrared laser, the composite Nd: Gd VO4 crystal is selected as the laser medium, and its related parameters are optimized to improve the laser output power. The results show that the thermal diffraction loss is proportional to the cross-sectional size of the laser medium, and the thermal damage threshold pumping power increases with decreasing cross-sectional size. Through the annular cavity mode selection method to achieve single-frequency laser operation, and use smaller cross-section laser crystals. Experiments show that the maximum output power of 1342 nm laser is 3.1 W, 30% higher than the previous laser output power.