Opt Lett. 2015 Aug 1;40(15):3635-8. doi: 10.1364/OL.40.003635.
We show that the propagation of the widely used Schell-model partially coherent light can be easily understood using the ambiguity function. This approach is especially beneficial for the analysis of the mutual intensity of Schell-model beams (SMBs), which are associated with stable coherent beams such as Laguerre-, Hermite-, and Ince-Gaussian. We study the evolution of the coherence singularities during the SMB propagation. It is demonstrated that the distance of singularity formation depends on the coherence degree of the input beam. Moreover, it is proved that the shape, position, and number of singularity curves in far field are defined by the associated coherent beam.
我们表明，使用模糊函数可以轻松理解广泛使用的 Schell 模型部分相干光的传播。这种方法特别有利于分析与稳定相干光束（如拉盖尔、厄米特和因策-高斯）相关的 Schell 模型光束（SMB）的互强度。我们研究了 SMB 传播过程中相干奇异点的演化。结果表明，奇异点形成的距离取决于输入光束的相干度。此外，还证明了远场中奇异曲线的形状、位置和数量由相关的相干光束定义。
