轨道角动量(orbital angular momentum，OAM)光束作为载波的自由空间光(free space opti-cal，FSO)通信系统极易受到大气湍流影响而导致通信质量下降。本文提出一种基于自参考干涉(self-referenced interference，SRI)法的相位补偿方案，并分析了针孔孔径和干涉强度比对其补偿性能的影响。通过仿真对比经典迭代算法，结果表明，本文方案在极大提升计算效率的同时，中低强度湍流下保持了较好的补偿效果，强湍流下补偿效果稍有减弱。
Research on phase compensation using self-referenced interferome-try for orbital angular momentum free space optical communica-tion
Free space optical(FSO)communication system using orbital angular momentum(OAM)beams as carriers is highly susceptible to the disturbance of atmospheric turbulence,leading to a degradation of communication quality.This paper proposes a phase compensation scheme based on self-referenced interferometry and analyzes the influence of pinhole aperture and interference intensity ratio on the compensation performance.Compared with classical iterative algorithms via simulations,the results show that the proposed scheme greatly improves computational efficiency while maintaining good compensation performance in weak to medium turbulence and existing slight impairment in strong turbulence.
orbital angular momentum(OAM)free space optical(FSO)communicationatmospheric turbulenceself-referenced interference(SRI)methodphase compensation
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