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以厄米-高斯混合模形式描述激光二极管光束的分布,利用光束二阶项矩阵进行计算,研究了光束束宽与光束传输因子之间的关系,并对各向异性大气湍流中广义指数和各向异性系数对光束传输因子的影响进行了分析。结果表明,对于不同的湍流强度,均存在不同的束宽使得光束传输因子最小。此外,大气湍流模型中各向异性系数的增大使得大气湍流对光束传输因子的影响相应减小。通过二维光束质量轨迹图的仿真,证实了各向异性系数对光束传输因子轨迹的影响将随着传输距离的增大变得更加明显。所得结果将有利于大气光传输理论的发展,并对大气光通信、激光雷达探测等应用有着重要意义。
The distribution of the laser diode beam is described in terms of Hermite - Gaussian mixture mode. The relationship between the beamwidth and the beam transmission factor is studied by using the second order matrix of the beam. The generalized exponential and the The influence of heterosexual coefficient on beam transmission factor is analyzed. The results show that for different turbulence intensities, there are different beam widths that minimize the beam transmission factor. In addition, the increase of anisotropy coefficient in atmospheric turbulence model makes the influence of atmospheric turbulence on the beam transmission factor decrease correspondingly. Through the simulation of two-dimensional beam trajectory, it is confirmed that the influence of anisotropy coefficient on the beam propagation factor trajectory will become more obvious as the transmission distance increases. The results will be conducive to the development of atmospheric light transmission theory, and atmospheric light communication, laser radar detection and other applications is of great significance.