简述了2 μm波段激光器潜在的应用前景。报道了采用793 nm激光二极管(LD)端面抽运TmYAP激光器, 实现室温下小型化的1.99 μm激光的高效输出。在抽运功率为4.5 W时, 获得功率为933 mW, 中心波长为1.99 μm的激光输出, 光光转换效率为27%, 斜率效率为37%。实验分析了影响激光输出的因素如输出镜曲率半径、耦合输出率和腔长等。

The potential application of 2 μm laser is introduced. A 793 nm fiber-coupled laser diode is used to end pump TmYAP laser. A high efficient and 1990 nm laser at room temperature is obtained. 933 mW output power is attained at 1990 nm when pumping power is 4.5 W. The optical-to-optical efficiency is 27%, and the slope efficiency is 37%. The influencing factors of the laser output are also analysed, such as the curve radius of output mirror, the output transmission and the length of the laser resonator.