Wang Yuyan, Mei Zhangrong, Zhang Ming, Mao Yonghua
Appl Opt. 2020 Mar 1;59(7):1834-1840. doi: 10.1364/AO.384851.
In a recent publication [Opt. Lett.43, 4727 (2018)OPLEDP0146-959210.1364/OL.43.004727], a novel class of partially coherent sources with complex degrees of coherence was introduced. In this paper, we obtain the expression of the cross-spectral density function of the self-shifting beam generated from a light source propagating in random media. Then we calculated and simulated the behaviors of the spectral density and the spectral degree of coherence in the propagation. The results show that there will be a phenomenon of self-shifting in propagation, and the coherence of the beam is Gaussian when it is far enough from the light source. The light intensity is weakened with an increase in turbulence, while the wander of the center of the spectral density remains unchanged in different media.
在最近的一篇出版物[《光学快报》43, 4727 (2018)，ISSN 0146 - 9592，doi:10.1364/OL.43.004727]中，引入了一类具有复相干度的新型部分相干源。在本文中，我们得到了在随机介质中传播的光源产生的自移光束的交叉谱密度函数的表达式。然后我们计算并模拟了传播过程中谱密度和谱相干度的行为。结果表明，在传播过程中会出现自移现象，并且当光束离光源足够远时其相干性呈高斯分布。随着湍流增加光强减弱，而在不同介质中谱密度中心的漂移保持不变。
