论文部分内容阅读
当激光在大气传输时,会引起光束的抖动、光束扩展和漂移等大气湍流效应,这严重影响了激光传输的效能。根据波动光学理论,建立了不同波束激光在大气湍流传输的数学模型,采用龙哥库塔法编写了四维程序。数值结果表明:大气湍流效应会造成激光光束的相位起伏变大,光束的聚焦能力减弱,光斑会发生分裂;相比高斯光束,矩形光束可大大减弱湍流效应。
When the laser is transmitted in the atmosphere, it can cause atmospheric turbulence effects such as beam jitter, beam expansion and drift, which seriously affect the performance of the laser transmission. According to the theory of wave optics, the mathematical model of different beam lasers transmitting in atmospheric turbulence is established, and a four-dimensional program is written by using the Long Cooper method. The numerical results show that the turbulence effect of the atmosphere causes the phase of the laser beam to become larger and larger, the focusing ability of the beam to weaken and the spot to be split. Compared with the Gaussian beam, the rectangular beam can greatly reduce the turbulence effect.