Multistaircase spiral phase plates (MSSPPs), which are alternatives to ideal continuous surface SPPs, are commonly applied to passively generate optical vortices (OVs). In addition, one of the universal applications of OVs is in orbital angular momentum (OAM)-multiplexed quadrature amplitude modulation (QAM) optical communication systems. In this paper, the relationship between bit error rate (BER) performance and the key parameters of the MSSPPs, e.g. the number of staircases M and the topological charge l , is researched, and four OAM-multiplexed QAM systems with different modulation orders (16 QAM, 32 QAM, 64 QAM and 256 QAM) are qualitatively and quantitatively evaluated. Theoretical analysis and the simulation results show that OAM multiplexing leads to negative impacts on BER performance. The impacts include a decrease in the power of the useful signal and possible crosstalk between OAM-multiplexed paths. In addition, appropriately setting M , l a...

中文翻译：

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基于多阶梯螺旋相位板的多路复用光通信系统轨道角动量误码率性能分析

多层楼梯螺旋相位板（MSSPP）是理想连续表面SPP的替代方案，通常用于被动产生光学涡旋（OV）。另外，OV的普遍应用之一是在轨道角动量（OAM）多路复用正交调幅（QAM）光通信系统中。本文研究了误码率（BER）性能与MSSPP关键参数之间的关系，例如阶梯数M和拓扑电荷l，并研究了四个具有不同调制阶数的OAM复用QAM系统（16 QAM，32 QAM，64 QAM和256 QAM）进行了定性和定量评估。理论分析和仿真结果表明，OAM多路复用会对BER性能产生负面影响。影响包括有用信号的功率降低以及OAM多路复用路径之间可能的串扰。另外，适当设置M，l a ...