Cosine-Gaussian Schell-model sources
Cosine-Gaussian Schell-model sources
复制标题
余弦高斯 Schell 模型源
DOI：
10.1364/ol.38.002578
复制
发表时间：
2013-07-15
期刊：
影响因子：
3.6
通讯作者：
Korotkova, Olga
中科院分区：
文献类型：
--
作者：
Mei, Zhangrong;Korotkova, Olga
我们引入了一类新的具有余弦-高斯谱相干度的谢尔型部分相干源，并证实了这种源是物理上真实的。在此基础上，推导了新型光源在自由空间中传输时产生的光束的交叉谱密度函数的表达式，并分析了谱密度和光谱相干度的演化。结果表明，在距光源足够远的地方，传输光束的相干度呈高斯型，而光谱密度则呈暗中空分布。(C)2013年美国光学学会
We introduce a new class of partially coherent sources of Schell type with cosine-Gaussian spectral degree of coherence and confirm that such sources are physically genuine. Further, we derive the expression for the cross-spectral density function of a beam generated by the novel source propagating in free space and analyze the evolution of the spectral density and the spectral degree of coherence. It is shown that at sufficiently large distances from the source the degree of coherence of the propagating beam assumes Gaussian shape while the spectral density takes on the dark-hollow profile. (C) 2013 Optical Society of America