摘要
用惠更斯-菲涅耳衍射积分对有振幅调制光束经锯齿光阑的衍射作了研究,并与经圆孔硬边光阑的衍射作了计算比较。另外讨论了锯齿光阑参数对有振幅调制光束衍射特性的影响。结果表明,锯齿光阑有较大的填充因子,能抑制轴上光强的衍射调制,并降低横向光强分布的不均匀性。
Based on the Huygens-Fresnel diffraction integral, the diffraction of laser beams with amplitude modulations passing serrated apertures is studied and compared with hard-edged circular apertures numerically. Furthermore, the effect of aperture parameters on the diffractlon characteristics of laser beams with amplitude modulations is also analyzed. It is shown that, while maintaining a relatively large fill factor, the use of serrated apertures can suppress the diffraction modulations of axial intensity and reduce the nonuniformity of transversal intensity distributions.
出处
《激光技术》
CAS
CSCD
北大核心
2006年第1期50-52,59,共4页
Laser Technology
基金
国家高技术基金资助项目(A823070)
关键词
激光光学
有振幅调制光束
锯齿光阑
衍射调制
laser optics
laser beams with amplitude modulations
serrated apertures
diffraction modulation
作者简介
刘永欣（1979-），女，硕士研究生，从事激光光束传输变换方面的研究工作。
吕百达，通讯联系人，E-mail：baidalu@scu．edu．cn
