光子学报 ›› 2019, Vol. 48 ›› Issue (2): 201002-0201002.doi: 10.3788/gzxb20194802.0201002

• 大气与海洋光学 • 上一篇    下一篇

一种改进的次谐波大气湍流相位屏模拟方法

刘涛1,2, 朱聪1, 孙春阳1, 张景芝1, 雷艳旭1, 张荣香3   

  1. 1. 华北电力大学 电子与通信工程系, 河北 保定 071003;
    2. 北京邮电大学 信息光子学与光通信研究院, 北京 100876;
    3. 河北大学 物理科学与技术学院, 河北 保定 071002
  • 收稿日期:2018-10-09 出版日期:2019-02-25 发布日期:2018-12-21
  • 作者简介:刘涛(1981-),男,副教授,博士,主要研究方向为光纤通信技术.Email:taoliu@ncepu.edu.cn
  • 基金资助:

    国家自然科学基金(No.61302105),中央高校基本科研业务费专项资金(No.2017MS107),河北省高等学校科学技术研究项目(No.QN2016093)

Improved Subharmonic Method for Simulation of Atmospheric Turbulence Phase Screen

LIU Tao1,2, ZHU Cong1, SUN Chun-yang1, ZHANG Jing-zhi1, LEI Yan-xu1, ZHANG Rong-xiang3   

  1. 1. Department of Electronic and Communication Engineering, North China Electric Power University, Baoding, Hebei 071003, China;
    2. Institute of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China;
    3. College of Physics Science and Technology, Hebei University, Baoding, Hebei 071002, China
  • Received:2018-10-09 Online:2019-02-25 Published:2018-12-21
  • Supported by:

    The National Natural Science Foundation of China (No. 61302105), the Fundamental Research Funds for the Central Universities (No. 2017MS107), the Science and Technology Research Foundation for Colleges and Universities in Hebei Province (No. QN2016093)

摘要:

提出了一种改进的次谐波大气湍流相位屏模拟方法,通过对低频相位屏的采样方式进行设计,能够充分地补偿相位屏中的低频信息.利用该方法对符合Kolmogorov理论的大气湍流相位屏进行数值模拟,并结合相位结构函数和相对误差函数对所提方法的准确性进行验证,分析谐波次数和采样点数对模拟相位屏的影响.此外,还将改进后的次谐波法与经典的功率谱反演法、Zernike多项式法、分形法及改进前的次谐波法进行了对比,结果表明:改进后的次谐波法对应的相位结构函数与Kolmogorov湍流理论值最符合,即利用此方法生成的相位屏最准确.

关键词: 次谐波, 相位结构函数, 光通信, 大气湍流, 大气光学, 相位屏

Abstract:

An improved subharmonic method to generate atmospheric turbulence phase screen was introduced. The low frequency phase screen is specifically designed to quickly achieve adequately sampling in low frequency portion of power spectrum. To evaluate the accuracy of the proposed method, the phase structure function of phase screen generated by using this method is calculated and compared with the theoretical Kolmogorov structure function. The accuracy of the simulated phase screen can be improved with the increase of subharmonics. In addition, comparison between the improved subharmonic method and other four phase screen generation methods (standard fast Fourier transform method, subharmonic method, Zernike polynomials method and random mid-point displacement method) is also carried out. The comparative results show that the phase structure function for the improved subharmonic method matches very closely that of Kolmogorov turbulence theory, and it is the best one in comparison with those of other four phase screen generation methods.

Key words: Atmospheric optics, Phase structure function, Phase screen, Atmospheric turbulence, Optical communications, Subharmonic

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