Author Affiliations
Abstract
Experimental Center for Physics Education, Department of Physics, State Key Laboratory of Precise Spectroscopy, East China Normal University, Shanghai 200062, China
The nonideal semi-Gaussian beam generated in our work has a certain ascent border width. Due to its asymmetry, the propagation properties of a nonideal semi-Gaussian laser beam in nonlinear materials have some unique characters. In our work, the propagation properties of a nonideal semi-Gaussian laser beam with a small ascent border width through a ZnSe nonlinear crystal is theoretically studied, and the relations of the propagation properties and the various parameters of the nonlinear medium and the semi-Gaussian beams are also analyzed theoretically in detail.
Chinese Optics Letters
2015, 13(Suppl): S22601
基于惠更斯菲涅耳衍射积分理论，对半高斯激光束在自由空间的传输特性进行了详细的理论研究，得到了二维半高斯激光束在自由空间传输时的光强分布计算表达式。数值计算结果表明半高斯激光束在自由空间传输时，在近场有很好的传输稳定性，当传输距离继续增大时，半高斯激光束的最大光强值不断降低，衍射条纹逐渐增多，同时上升沿宽度慢慢展宽，最后在远场转化为对称性光束。数值计算结果还发现对称性越好的半高斯激光束其传输稳定性越好。
激光光学 半高斯激光束 传输特性 自由空间 激光与光电子学进展
2013, 50(12): 121405
