Finally several beam models for the partially coherent beam are introduced , which include gsm beam , polychromatic vector gsm beam and partially polarized gaussian schell - model ( pgsm ) beam et al 阐述了描述部分相干光束的数学-物理模型,包括高斯-谢尔模型( gsm )光束、多色矢量高斯-谢尔模型光束和准单色矢量高斯-谢尔模型光束即准单色部分偏振高斯-谢尔模型( pgsm )光束。
Based on the propagation law of the cross - spectral density function in the space - frequency domain , the properties of polychromatic vector gsm beams through a paraxial optical abcd system are studied . the analytical propagation expressions for the cross - spectral density matrix of vector gsm beams passing through a paraxial optical abcd system are derived , which permits us to study the propagation properties of vector gsm beams , including the propagation - induced polarization changes , effect of the spectrum bandwidth and irradiance distributions in a unique way . there are some applications of the theoretical results 基于空间一频率域中交叉谱密度函数的传输理论,研究了多色矢量gsm光束通过abcd光学系统传输时偏振特性的变化规律,首次推出了矢量高斯一谢尔模刑fgsm )光束通过近轴abcd光学系统交叉谱密度矩阵的传输公式,并对矢量gsm光束传输中偏振的变化、谱宽的影响和强度的分布等进行了统一研究。
As an example , polarization changes in vector gsm beams propagating through a telescopic system have been analyzed and illustrated by numerical results . it has been found that propagation - induced polarization changes are non - uniform across the beam cross - section . for the symmetric gaussian spectrum , the effect of the bandwidth on the polarization is barely noticeable 以望远镜系统为例进行的数值分析表明,多色矢量gsm光束的偏振不再是均匀偏振,对源光谱为对称分布高斯型的多色矢量gsm光束,谱宽对光束偏振特性的影响不明显。