低温Fe^(2+):ZnSe固体激光器的长脉冲输出特性

Long-Pulse Output Characteristics of Solid-State Fe^(2+):ZnSe Laser at Low Temperature

对基于不同Fe^(2+)∶Zn Se晶体样品的中红外固体激光器的长脉冲输出特性进行了研究。采用一台最大单脉冲能量为600 m J的Er∶YAG脉冲激光器作为泵浦源,将晶体置于真空仓中用液氮冷却。低温85 K时,在6mm厚的镀膜样品上实现了最大能量为184.4 mJ、脉宽为1 ms的长脉冲输出,对应斜效率为45.5%。对未镀膜样品,比较了在晶体不同固定角度时的输出特性,结果表明,适当倾斜时输出能量更高。

In this paper,the long-pulse output characteristics of a mid-infrared solid-state laser based on different Fe^(2+)∶Zn Se crystal samples are investigated.An Er∶YAG pulse laser with a maximum single-pulse energy of 600 m J is utilized as the pump source,and the crystal is cooled in a vacuum chamber with liquid nitrogen.A long-pulse output with a maximum energy of 184.4 m J and a pulse width of 1 ms,corresponding to a slope efficiency of 45.5%,is achieved on a6 mm thickness coated sample at 85 K.For the uncoated sample,the output characteristics are compared at different fixed angles of the sample,and the results show that the output efficiency is higher when appropriately tilted.