School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China.
Opt Lett. 2010 Mar 1;35(5):715-7. doi: 10.1364/OL.35.000715.
We show that the far-field beam spreading and direction of partially coherent Gaussian-Schell model (GSM) beams are independent on the spatial coherence of the source through non-Kolmogorov atmospheric turbulence, which has potential applications in long-distance free-space optical communication. The effects of spatial coherence, exponent value alpha, and inner scale and outer scale of atmospheric turbulence on beam spreading are studied in details. The GSM beam has greater spreading for smaller inner scale or bigger outer scale through non-Kolmogorov turbulent atmosphere.
我们表明，通过非 Kolmogorov 大气湍流，部分相干高斯 Schell 模型（GSM）光束的远场光束扩展和方向与光源的空间相干性无关，这在长距离自由空间光通信中有潜在的应用。详细研究了空间相干性、指数值 alpha、大气湍流的内尺度和外尺度对光束扩展的影响。通过非 Kolmogorov 湍流大气，GSM 光束的内尺度越小或外尺度越大，扩展越大。
