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Mode-dependent crosstalk and detection probability of orbital angular momentum of optical vortex beam through atmospheric turbulence
Journal of Optics ( IF 2.1 ) Pub Date : 2020-06-25 , DOI: 10.1088/2040-8986/ab9799 Lihong Zhang 1, 2, 3 , Feng Shen 1, 2 , Bin Lan 1, 2 , Ao Tang 1, 2, 3
Journal of Optics ( IF 2.1 ) Pub Date : 2020-06-25 , DOI: 10.1088/2040-8986/ab9799 Lihong Zhang 1, 2, 3 , Feng Shen 1, 2 , Bin Lan 1, 2 , Ao Tang 1, 2, 3
Affiliation
The crosstalk of orbital angular momentum(OAM)modes is one of the most important issues for free-space optical (FSO) communication. We theoretically derive a crosstalk model for Laguerre-Gaussian (LG) vortex beams propagating in turbulent atmosphere. The calculated crosstalk of different OAM modes in different turbulence by analytical expression is consistent with experimental measurements. Both theoretical and experimental results reveal that the crosstalk of high order LG vortex beams is more obvious in atmospheric turbulence. Different from the numerical calculation of the integral expression of the previous studies, this analytical expression can directly and quantitatively characterize the crosstalk and the law of different topological charges in vortex beams. Based on this analytical expression, the crosstalk widths of vortex beams with different topological charges can be calculated accurately, so that the optimal sets of OAM modes can be found more easily under each atmospheric turbulence condition.
中文翻译:
大气湍流下光学涡旋光束轨道角动量的模态串扰及探测概率
轨道角动量(OAM)模式的串扰是自由空间光(FSO)通信最重要的问题之一。我们从理论上推导出了在湍流大气中传播的拉盖尔-高斯 (LG) 涡旋光束的串扰模型。通过解析表达式计算出的不同OAM模式在不同湍流下的串扰与实验测量结果一致。理论和实验结果都表明,在大气湍流中,高阶LG涡旋光束的串扰更为明显。不同于以往研究中积分表达式的数值计算,该解析表达式可以直接、定量地表征涡旋光束中不同拓扑电荷的串扰和规律。基于这个解析表达式,
更新日期:2020-06-25
中文翻译:
大气湍流下光学涡旋光束轨道角动量的模态串扰及探测概率
轨道角动量(OAM)模式的串扰是自由空间光(FSO)通信最重要的问题之一。我们从理论上推导出了在湍流大气中传播的拉盖尔-高斯 (LG) 涡旋光束的串扰模型。通过解析表达式计算出的不同OAM模式在不同湍流下的串扰与实验测量结果一致。理论和实验结果都表明,在大气湍流中,高阶LG涡旋光束的串扰更为明显。不同于以往研究中积分表达式的数值计算,该解析表达式可以直接、定量地表征涡旋光束中不同拓扑电荷的串扰和规律。基于这个解析表达式,