Adaptive turbulence compensation with a hybrid input-output algorithm in orbital angular momentum-based free-space optical communication

Yin Xiaoli; Chang Huan; Cui Xiaozhou; Ma Jian-Xin; Wang Yong-Jun; Wu Guo-Hua; Zhang Lijia; Xin Xiangjun

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Adaptive turbulence compensation with a hybrid input-output algorithm in orbital angular momentum-based free-space optical communication

机译：基于轨道角动量的自由空间光通信中的混合输入输出算法自适应湍流补偿

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Atmospheric turbulence is a major challenge for practical orbital angular momentum (OAM)-based free-space optical (FSO) communication systems that causes intermodal crosstalk and degrades the performance of the system. Herein, we propose a hybrid input-output algorithm (HIOA)-based adaptive optics (AO) system to compensate for distorted OAM beams. The principle and parameters of the HIOA-based AO system in an OAM-based FSO system are analyzed, and the performance is discussed. The simulation results indicate that the HIOA-based AO system can effectively correct distorted OAM beams and that the HIOA improves the compensation performance and convergence speed compared to the traditional Gerchberg-Saxton algorithm. Moreover, we analyze the compensation performance based on different probe beams. Using an OAM beam with state l = 1 as a probe beam can yield better correction effects than a Gaussian beam. This work verifies the feasibility of using an HIOA for adaptive turbulence compensation and provides new insights into OAM communication systems. (C) 2018 Optical Society of America.

机译：大气湍流是实际轨道角动量（OAM）的主要挑战 - 基于淘汰的自由空间光学（FSO）通信系统，其导致多语串扰并降低了系统的性能。在此，我们提出了一种混合输入 - 基于A自适应光学（AO）系统以补偿失真的OAM光束。分析了基于OAM的FSO系统中的基于HIOA的AO系统的原理和参数，并讨论了性能。模拟结果表明，与传统的Gerchberg-Saxton算法相比，仿真结果表明，基于HIOA的AO系统可以有效地校正扭曲的OAM光束，并且通过传统的Gerchberg-Saxton算法，HioA提高了补偿性能和收敛速度。此外，我们根据不同的探针光束分析补偿性能。使用具有状态L = 1的OAM光束作为探针光束可以产生比高斯光束更好的校正效果。这项工作验证了使用HIOA进行适应性湍流补偿的可行性，并为OAM通信系统提供新的见解。（c）2018年光学学会。

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来源
《Applied optics》 |2018年第26期|共7页
作者
Yin Xiaoli; Chang Huan; Cui Xiaozhou; Ma Jian-Xin; Wang Yong-Jun; Wu Guo-Hua; Zhang Lijia; Xin Xiangjun;
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作者单位

Beijing Univ Posts &

Telecommun Sch Elect Engn Beijing 100876 Peoples R China;

Beijing Univ Posts &

Telecommun Sch Elect Engn Beijing 100876 Peoples R China;

Beijing Univ Posts &

Telecommun Sch Elect Engn Beijing 100876 Peoples R China;

Beijing Univ Posts &

Telecommun Sch Elect Engn Beijing 100876 Peoples R China;

Beijing Univ Posts &

Telecommun Sch Elect Engn Beijing 100876 Peoples R China;

Beijing Univ Posts &

Telecommun Sch Elect Engn Beijing 100876 Peoples R China;

Beijing Univ Posts &

Telecommun Sch Elect Engn Beijing 100876 Peoples R China;

Beijing Univ Posts &

Telecommun Sch Elect Engn Beijing 100876 Peoples R China;

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Adaptive turbulence compensation with a hybrid input-output algorithm in orbital angular momentum-based free-space optical communication

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