UR90腔相干并束输出的实验研究

Experimental Research of UR90 Resonator with Combined Coherent Output

用多个UR90腔进行正向模耦合的方法来产生多束相干的激光 ,解决了反向模耦合中存在的失谐问题 ,可以大大提高系统的可靠性。并利用铜蒸气激光器实现了两台低放大倍率 (M =1 2 1)UR90腔的相干并束输出 ,对输出光束的远场方向性进行了测量分析。结果表明 ,和以前单台UR90腔相比 ,此方法对UR90腔的模控能力和输出光束的光束质量并没有明显影响 ,是一种简单而有效的耦合方式。

In this paper, a new method of obtaining multi coherent beams by UR90 resonators coupled with forward mode was given, by which a problem was called “detune” existing in method of backward mode was resolved, and the reliability of system was enhanced obviously. The far field intensities and divergence angles of combined beam of two copper vapor lasers with UR90 resonators coupled at small magnification (M=1.21) were measured and analyzed experimentally. The results demonstrated that the mode control ability and far field intensity distributions of UR90 resonators coupled by forward mode are still good.