一种改善激光器输出光束质量的新型谐振腔

A Novel Resonator to Improve the Laser Beam Quality

由于横向抽运的DPSSL输出光束在两个垂直方向上有不同的发散角 ,把一对平行放置的柱透镜置于谐振腔内 ,形成一种可以改善激光器输出光束质量的新型谐振腔。利用 ABCD传输矩阵理论及等效G参数法计算了稳腔范围。从实验上测得横向上光束质量为M2x =1 2 31,而对于简单的平凹腔M2x =2 6 72 。

A novel resonator with two parallel cylindrical lenses is reported to improve the beam quality factor. The stable cavity condition is obtained by ABCD law and equivalent G parameter method. Experimental results show that the beam quality factor in the horizontal direction M 2 x=1.231, it is less than half of the M 2 x=2.672 obtained from the regular stable cavity.