为了分析斜程大气信道中湍流像差对激光束轨道角动量态的作用, 数值研究了湍流z-倾斜像差、湍流像散和湍流慧差对激光束轨道角动量态测量概率的影响, 得出了此3种湍流像差随折射率结构常数、传输距离和天顶角起伏影响光束轨道角动量态测量概率的规律。结果表明, 随着地面湍流强度增强、信道长度增长和天顶角的增大, 湍流z-倾斜像差使激光束原轨道角动量态的测得概率进一步降低, 湍流慧差仅在天顶角增大时才出现激光束原轨道角动量态的测得概率进一步降低现象, 湍流像散对激光束原轨道角动量态测得概率的影响随此3参量变化时基本不变。

In order to analyze influence of the turbulent aberrations on orbital angular momentum states of laser beam propagating in slant atmosphere-channel, effect of z-tilt aberration, astigmatism aberration and coma aberration on the detection probability of the orbital angular momentum states of laser beam was simulated and the impact regularity of the three aberrations as a function of index-of-refraction, propagation distance and zenith angle of communication channel on the detection probability of the orbital angular momentum states was obtained. The results show that with the increase of the zenith angle of communication channel, the atmospheric turbulence and the channel distance, the detection probability of the orbital angular momentum states of laser beams induced by z-tilt aberration decreases more. For turbulence coma aberration, only when the zenith angle of communication channel increases, the detection probability of the orbital angular momentum states of laser beams will decrease more. The effect of astigmatism aberration on the detection probability of the orbital angular momentum states of laser beam is independent of the change of these three factors and can be ignored.