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自由空间中带有光学涡的部分相干光的传输特性是影响大气光通信系统性能的关键因子之一.基于弱湍流大气中光波传输的 Rytov 方法和部分相干光的互相干函数的交叉谱密度函数近似,研究了带有“光学涡”的空间部分相干拉盖尔-高斯光束在湍流大气中的传输特性,得出了弱湍流大气中传输的部分相干光束互相干函数和平均光强空间分布的解析关系.研究结果表明,弱湍流大气起伏仅仅影响这类光束相干函数的幅值,不改变光束光学涡的分布特征.
The transmission characteristics of partially coherent light with optical vortex in free space are one of the key factors affecting the performance of atmospheric optical communication system. The cross-spectral density function of the Rytov method and the coherent function of partially coherent light based on the propagation of light waves in a weak turbulent atmosphere Approximately, the propagation properties of the partially coherent Laguerre-Gaussian beams with “optical vortex ” in the turbulent atmosphere are studied, and the coherence functions of the partially coherent beams propagating in the weak turbulent atmosphere and the average light intensity The results show that the weak turbulent atmospheric fluctuations affect only the magnitude of the coherence function of these beams and do not change the distribution characteristics of the optical vortex.