880 nm LD泵浦Nd:GdVO4 混合腔激光器1.34 μm实验研究

将880 nm 上能级直接泵浦与部分端面泵浦混合腔结构结合，对Nd:GdVO4 晶体的1 342 nm激光输出特性进行了实验研究。采用正支离轴混合谐振腔，4-bar 中心波长为880 nm 的激光二极管列阵作为泵浦源，在泵浦功率为178W 时，激光输出功率为26.3W，斜效率和光-光转换效率分别为27%和14.8%。在20W 输出功率时非稳腔和稳腔方向的M2因子均为1.3。结果表明:由于采用了上能级直接泵浦与部分端面泵浦混合腔结构，相对于目前同等输出功率级别的端面泵浦Nd:GdVO4 激光器，光束质量得到很大提高。

Experimental study of 880 nm lase-diode en-pumped Nd:GdVO4 laser with hybrid resonator at 1.34 μm

The 880 nm LD directly pumping into the emitting level with LD partially en-pumped structure was combined, some experiment was done to study the output characteristic of Nd:GdVO4 laser at 1 342 nm. An of-axis positive confocal unstable resonator was built up, and a 4-bar laser diode stack which central wavelength was 880 nm as pump source was used. 26.3W continuou-wave laser power output was gotten under the pump power of 178 W, and the slope efficiency and optica-t-optical efficiency were 27% and nearly 14.8%, respectively. At the output power of 20 W, beam quality M2 factors were both 1.3 in the unstable direction and stable direction. The result showed that by combining 880 nm LD directly pumping into the emitting level with LD partially en-pumped structure, beam quality has been greatly improved compared with the same output power level en-pumped Nd: GdVO4 laser.