摘要
从偏振矩阵和交叉谱密度传输公式出发,分析了硬边光阑对多色矢量高斯-谢尔模型光束轴上光谱开关的影响。结果表明,插入偏振片前,光谱开关的光谱跃迁量Δ随截断参数δ的增加而减少,光谱极小值Sm in和位置zc/z0随δ的增加而增大。插入偏振片后,光谱开关随δ的变化规律与插入偏振片前的变化规律相同。但偏振片的旋转角度θ会对出现光谱开关的δ的范围产生影响。
Starting from the polarization matrix and propagation equation of the cross-spectral density matrix, a detailed study of the influence of hard-edge aperture on the spectral switch of polychromatic vector Gaussian-ScheU model beams is performed. It is shown that before inserting a polarizer the transition height △ of the spectral switch decreases, the minimum Smin, and the critical, position zc/z0 increase as the truncation parameter 6 increases. Alter inserting the polarizer, the spectral switch varies with the tnmcation parameter 8 in a similar way as the case without the polarizer. However,the polarization angle 0 affects the range of the truncation parameter 8 at which the spectral switch appears.
出处
《激光技术》
CAS
CSCD
北大核心
2006年第2期142-144,147,共4页
Laser Technology
基金
四川省教育厅重点项目基金资助项目(2003A166)
关键词
现代光学
硬边光阑
多色矢量光束
光谱开关
modern optics
hard-edge aperture
polychromatic vector beam
spectral switch
