论文部分内容阅读
根据广义Huygens-Fresnel原理和修正von Karman谱模型,推导得到无线光通信系统中相互独立的部分相干高斯一谢尔模型(GSM)阵列光束在大气湍流中传输时的光强分布、均方根束宽和桶中功率解析式,并对不同因素影响下的自耦合特性、光束扩展和桶中功率进行了数值分析。结果表明,部分相干GSM阵列光束在大气传输过程中,当到达某一距离时多束光能合成一个平顶光束,再演变为高斯光束,且阵列光束在大气湍流中的自耦合特性比在自由空间中好;湍流外尺度对光强分布、光束扩展影响很小,可以忽略;部分相干GSM阵列光束与部分相干单GSM光束相比,具有更强的抑制湍流特性,有利于实现远距离通信。
According to the generalized Huygens-Fresnel principle and the modified von Karman spectral model, the light intensity distributions of mutually independent partially coherent Gaussian-Shear model (GSM) beams in a wireless optical communication system during atmospheric turbulence are derived. The root mean square Width and barrel power analytic formula, and under the influence of different factors under the self-coupling characteristics, beam expansion and barrel power numerical analysis. The results show that when a partially coherent GSM array beam propagates in the atmosphere, the multi-beams of light can synthesize a flattened beam and then evolve into a Gaussian beam when reaching a certain distance. The self-coupling characteristics of the array beam in the atmospheric turbulence are better than those in the free The space scale is good. The turbulence outer scale has little effect on the light intensity distribution and beam expansion, and can be neglected. The partially coherent GSM array beam has more restrained turbulence characteristics than some coherent single GSM beams, which is good for long-distance communication.