Xu Qiang, Han Yiping, Cui Zhiwei
School of Science, Xidian University No. 2 Tai Bai South Road, Xi'an, 710071 China.
Appl Opt. 2010 Jan 20;49(3):549-53. doi: 10.1364/AO.49.000549.
A mathematical model of a laser diode beam propagating through a collimating lens is presented. Wave propagation beyond the paraxial approximation is studied. The phase delay of the laser diode wave in passing through the lens is analyzed in detail. The propagation optical field after the lens is obtained from the diffraction integral by the stationary phase method. The model is employed to predict the light intensity at various beam cross sections, and the computed intensity distributions are in a good agreement with the corresponding measurements.
提出了一种激光二极管光束通过准直透镜传播的数学模型。研究了傍轴近似之外的波传播。详细分析了激光二极管波通过透镜时的相位延迟。通过稳相法从衍射积分得到透镜后的传播光场。该模型用于预测不同光束横截面处的光强，计算得到的强度分布与相应的测量结果吻合良好。
