利用激光二极管(LD)阵列端面抽运Nd:YVO4板条晶体, 结合稳定非稳混合腔, 实现了高功率、高效率、高光束质量的1064 nm和1342 nm激光输出。板条Nd:YVO4晶体掺杂原子数分数为0.3%, 尺寸12 mm×10 mm×1 mm, a轴切割, c轴平行于12 mm方向。采用稳定正支共焦非稳腔, 在抽运功率为265 W时, 得到了123 W的1064 nm连续激光输出, 光光转换效率和斜效率分别为46.4%和52.4%; 在输出功率约为100 W时测得稳腔和非稳腔两个方向的M2因子均为1.3, 输出功率不稳定性小于1%。采用稳定负支共焦非稳腔, 在抽运功率为139.5 W时, 得到35.4 W的1342 nm激光输出, 光光转换效率为25.4%, 在稳腔方向光束质量为M2=1.23; 在非稳腔方向光束质量为M2=1.14。

Laser diode stack end-pumped Nd:YVO4 slab lasers with hybrid resonator operating at both 1064 nm and 1342 nm are demonstrated. The size of the atomic fraction of 0.3% doped Nd:YVO4 slab crystal is 12 mm×10 mm×1 mm, which is cut along a axis and the c axis is parallel with the 12 mm direction. By using a stable-positive confocal unstable resonator, 123 W at 1064 nm and 35.4 W at 1342 nm laser output are realized with M2 factor of 1.3 and the optical conversion efficiency of 46.6%, and its stability is better than 1%. With a stable-negative confocal unstable cavity, 35.4 W 1342 nm laser is obtained under the pump power of 139.5 W, with M2 factor less than 1.3 and the optical conversion efficiency of 25.4%.