Opt Lett. 2018 Sep 15;43(18):4346-4349. doi: 10.1364/OL.43.004346.
We present a Nd:GdVO bulk crystal oscillator with >70 WTEM laser output based on the orthogonal thermal compensation architecture. The asymmetry of thermo-optical effects in the anisotropic crystal was well compensated for, and the overall thermal load was also distributed to lower the crystal temperature and the risk of crystal fracture. At an output coupling of 60%, a 71.2 W, TEM laser output was achieved with 44% optical efficiency. The diffraction-limited beam quality was measured to be Mx2=1.01 and My2=1.04 in the orthogonal directions.
我们提出了一种基于正交热补偿结构的 Nd:GdVO4 块状晶体振荡器，其激光输出超过 70 WTEM。各向异性晶体中热光效应的不对称性得到了很好的补偿，整体热负荷也得到了分散，从而降低了晶体温度和晶体破裂的风险。在输出耦合率为 60%的情况下，实现了 71.2 W、TEM 激光输出，其光效率为 44%。在正交方向上，测量到的衍射极限光束质量为 Mx2=1.01 和 My2=1.04。
