四拉盖尔高斯光束在大气湍流中传输时的闪烁研究

Study on Scintillation of Four Laguerre-Gauss Beams Propagating through the Atmospheric Turbulence

采用相位屏法模拟仿真,对四拉盖尔高斯光束(Laguerre Gauss,LG)在大气湍流中传输时的闪烁性能进行了研究。结果表明:与单LG光束相比,四LG光束可以降低光传输中的闪烁指数;和外尺度相比,内尺度对光束闪烁指数的影响较大;光束的拓扑荷或者径向量子数越大,四LG光束的闪烁指数越大;当光束之间的距离取合适的值时,LG光束在大气湍流中的闪烁指数可取得最小值。

The scintillation properties of four Laguerre-Gauss（LG）beam propagating through the atmospheric turbulence are investigated by the phase-screen simulation.The results indicate that the four LG beams can reduce the scintillation index compared with the single LG beam.Besides,the inner scales have bigger effect on the scintillation index of the LG beam compared with the outer scales.And the scintillation index of the LG beam will become bigger with increases of the bigger topological charge or bigger radial quantum number.At last,the scintillation index of the LG beam achieves the minimum value by using aproper value of the distance between the LG beams.