平顶高斯光束及其通过圆孔光阑的衍射  

The Diffraction of Flot-topped Gauss Beam Passed circular Aperture

作　　者：屈军[1] 丁培宏[1] 孟凯[1] 崔执凤[1] 

机构地区：[1]安徽师范大学物理与电子信息学院,安徽芜湖241000

出　　处：《应用激光》2007年第4期318-321,共4页Applied Laser

基　　金：安徽师范大学博士启动基金;安徽省高等学校青年教师科研资助计划自然科学项目(2005jql164)

摘　　要：为了研究平顶高斯光束通过圆孔硬边光阑衍射特性,本文从collins公式出发,采用数值模拟的方法,模拟结果表明:平顶高斯光束在阶数大于10以后,光强的分布变化不大。平顶高斯光束经过圆孔衍射,孔径大时光强在横截面调制越厉害,但是强度小;孔径小时光强在横截面调制相对小,但是光强度相对大。轴上光强分布在孔径大时随菲涅耳数增大出现增大现象;孔径小时光强在轴上分布随菲涅耳数出现周期性振荡的调制特性。From the collins formula, the diffraction of riot-topped Gauss beams through circular aperture was studied. The resuits indicated that the change of flot-topped Gauss beams＇ intensity is small as the rank excess ten. The modulation of cross section is obviously, the intensity of it is smaller as the circular aperture is bigger and the intensity is bigger as the circular aperture is smaller. The axial intensity of flot-topped Gauss beams through circular aperture is increase with Fresnel F as the circular aperture is bigger. And it assure the periodic oscillation with F as the circular aperture is smaller.

关 键 词：激光光学 平顶高斯光束 衍射 圆孔光阑 

分 类 号：TN241[电子电信—物理电子学]