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研究了一种平面波导激光器,它包含一个13mm×12mm×150μmYb∶YAG棒芯,外面包覆1mm厚的蓝宝石,通过两个450W二极管叠阵进行边缘泵浦,叠阵加入了定制的像差修正相位片。激光器的平-凹谐振腔与其他圆盘薄片激光器相比,可以产生400W的平均功率,激光束为低阶横模和多阶纵模,斜率效率75%,横向光束质量通过采用新型模式选择的环形激光切割谐振腔反射镜来提高,同时侧向光束质量通过采用非稳腔来提高。光束在谐振腔内每个往返可以得到3～4个均匀放大增益,这就为功率增大提供了手段。
A planar waveguide laser was studied that includes a 13 mm × 12 mm × 150 μm Yb: YAG rod core coated with 1 mm thick sapphire and edge-pumped by two 450 W diode arrays with a custom array aberration correction Phase piece. The laser’s flat-concave resonator produces an average power of 400W compared to other disk-based lasers. The laser beam is a low-order transverse mode and a multi-step longitudinal mode with a slope efficiency of 75%. The lateral beam quality is enhanced by the new mode selection The ring laser cuts the cavity mirrors to improve, while the lateral beam quality is improved by using unstable cavities. Beam in the resonant cavity of each round trip can get 3 to 4 uniform amplification gain, which provides a means for increasing the power.