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激光传输大气湍流效应复域仿真模拟方法研究

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针对光场所受到的湍流畸变影响,提出了一种模拟激光传输大气湍流效应的新方法,利用大气湍流效应的统计学特性,实现了激光传输大气湍流效应在幅度域和相位域两个维度的联合模拟,且该方法适用于弱、中、强三种湍流情况.基于可描述不同湍流强度下光场幅度畸变的两种统计模型,采用随机微分方法得到光波幅度变化序列,光波幅度变化序列模拟结果与理论计算结果在不同湍流强度下均较好地吻合,拟合系数均大于0.9767;基于低频次谐波补偿的功率谱反演方法,采用三阶贝塞尔函数随机曲线设计生成时变相位屏对大气湍流效应中的相位畸变进行模拟.在不同湍流强度下,采用高斯光束作为光源,通过对时变相位屏移动过程中接收光斑强度进行归一化统计,模拟结果表明,所构建的大气湍流效应复域仿真模型模拟的效果与实际大气湍流畸变过程吻合.
Complex-domain simulation and modeling method for atmospheric turbulence effect of laser transmission
Aiming at the effect of turbulent distortion on the optical field,a new method to simulate the atmospheric turbulence effect of laser transmission is proposed,which realizes the joint simulation of the atmospheric turbulence effect of laser transmission in two dimensions,the amplitude domain and the phase domain,by using the statistical properties of the atmospheric turbulence effect,and the method is applicable to weak,moderate and strong turbulence cases.Based on the two statistical models that can describe the optical field amplitude aberration under different tur-bulence intensities,the stochastic differentiation method is used to obtain the optical wave amplitude change se-quence,and the simulation results of the optical wave amplitude change sequence match well with the theoretical cal-culations under different turbulence intensities,and the fitting coefficients are all greater than 0.9767.A power spec-trum inversion method based on low-frequency harmonic compensation is utilized to generate a time-varying phase screen using a third-order Bessel function stochastic curve design to simulate phase aberrations in atmospheric turbu-lence effects.Under different turbulence intensities,a Gaussian beam is used as the light source,and the simulation re-sults show that the simulated effects of the constructed complex-domain simulation model of atmospheric turbulence effects coincide with the actual atmospheric turbulence aberration process through the normalized statistics of the in-tensity of the received spot during the moving process of the time-varying phase screen.

laser transmissionatmospheric turbulencecomplex domain simulationamplitude distortionphase distortion

赵建彤、刘智、姚海峰、蒋青芳、杨亚欣

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长春理工大学电子信息工程学院,吉林长春 130022

长春理工大学空间光电技术国家地方联合工程研究中心,吉林长春 130022

北京理工大学光电学院,北京 100081

激光传输 大气湍流 复域仿真 幅度畸变 相位畸变

国家自然科学基金叶企孙科学基金项目国家自然科学青年科学基金项目中国博士后科学基金项目中国博士后科学基金项目应用光学国家重点实验室基金项目

U2141231621050292021TQ00352021M700415SKLA02022001A11

2024

10.3969/j.issn.1001-5078.2024.06.006

激光与红外
华北光电技术研究所

激光与红外

CSTPCD北大核心
影响因子：0.723
ISSN：1001-5078
年,卷(期)：2024.54(6)