激光二极管抽运的高光束质量的Yb∶YAG薄片激光器  

LD-Pumped Yb∶YAG Chip Laser with High Beam Quality

作　　者：李磊[1] 杨苏辉[1] 孙文峰[1] 赵长明[1] 

机构地区：[1]北京理工大学光电工程系,北京100081

出　　处：《中国激光》2004年第11期1285-1288,共4页Chinese Journal of Lasers

基　　金：军用固体激光技术国防科技重点实验室基金(00JS08.1.3.BQ0103)资助项目。

摘　　要：演示了激光二极管(LD)端面抽运Yb∶YAG薄片固体激光器,抽运源是美国相干公司(COHERENT)光纤耦合输出半导体激光器,光纤输出芯径为800μm,在940nm处最大输出功率为1356W,由于光纤输出芯径较大,不利于抽运光和振荡光的模式匹配,为了得到较小的抽运光斑,采用了焦距比为30∶12的耦合透镜组压缩入射到晶体端面的抽运光光腰半径,晶体为原子掺杂浓度8at.%,几何尺寸为7mm×16mm国产Yb∶YAG晶体,整个实验装置采用温差电致冷(TEC)和循环水冷却方式,实验中得到了306W的连续激光输出,激光器的斜率效率为331%,测得M2因子在x和y方向分别为154和173,具有良好的光束质量。A laser diode (LD) end pumped Yb∶YAG (Yb∶Y 3Al 5O 12 ) chip laser has been demonstrated. The pumping source is a fiber coupled laser diode array with maximum output power of 13.56 W at 940 nm. The diameter of the fiber is 800 μm. Two lenses with focal length ratio of 30∶12 have been used to compress the pumping light into the laser crystal. 3.06 W continuous wave (CW) output power was obtained from the 8 at. % doped, 1.6 mm thick Yb∶YAG crystal, the whole experiment set was cooled by thermoelectric cooler (TEC) and cooling water, slope efficiency was 33.1%, the M 2 values were measured to be 1.54 and 1.73 in the x and y directions respectively.

关 键 词：激光技术 Yb:YAG薄片激光器 激光二极管抽运 光束质量 

分 类 号：TN242[电子电信—物理电子学]