Changes in the polarization and coherence of a random electromagnetic beam propagating through a misaligned optical system.
Changes in the polarization and coherence of a random electromagnetic beam propagating through a misaligned optical system.
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DOI：
10.1364/josaa.25.000773
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发表时间：
2008-03
期刊：
影响因子：
--
通讯作者：
X. Du;Daomu Zhao
中科院分区：
文献类型：
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作者：
X. Du;Daomu Zhao
从失调光学系统在空间域的广义衍射积分公式出发，导出了随机电磁光束通过失调光学系统的互谱密度矩阵元素的解析传输表达式。一些分析示出的数值例子有关的光谱偏振度和电磁高斯谢尔模型光束传播通过这样的光学系统的光谱相干度的变化。我们发现焦平面附近区域的偏振度是振荡的，失调对相干性的影响不如对偏振的影响明显。
On the basis of the generalized diffraction integral formula for misaligned optical systems in the spatial domain, an analytical propagation expression for the elements of the cross-spectral density matrix of a random electromagnetic beam passing through a misaligned optical system is derived. Some analyses are illustrated by numerical examples relating to changes in the spectral degree of polarization and in the spectral degree of coherence of an electromagnetic Gaussian-Schell-model beam propagating through such an optical system. We find that the degree of polarization in the neighboring areas of the focal plane is oscillating, and the effect of misalignment on coherence is not so evident as that on polarization.