矢量多高斯-谢尔模型光束在大气湍流中上行链路中的传输特性  

Propagation Properties of Electromagnetic Gaussian Multi-Schell Model Beams Through Atmospheric Turbulence in a Slanted Path

作　　者：刘侠[1,2] 吴国华[3] 曹丁象[1,2] 邓剑钦[1,2] 肖青[1,2] 姚建铨[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院,激光与光电子研究所,天津300072 [2]光库通讯(珠海)有限公司,广东珠海519080 [3]北京邮电大学电子工程学院,北京100876

出　　处：《激光与光电子学进展》2015年第2期91-96,共6页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61471051)

摘　　要：为了有效地提高星地激光通信系统的通信性能,从推广的惠更斯-菲涅耳衍射原理出发,系统研究了矢量多高斯-谢尔模型光束在上行链路中的传输特性。研究结果表明,改变光束的横向相干长度能有效地改变其远场光强分布和大气湍流引起的光束展宽。另外,大气湍流会改变矢量多高斯光束的偏振度,但是在远场其偏振度会趋于一个固定值。该研究结果对星地激光通信等有着潜在的应用价值。Based on the extended Huygens- Fresnel principle, the propagation properties of electromagnetic Gaussian multi-Schell model beams through atmospheric turbulence in a slanted path are investigated in detail.Results indicate that the changing of transverse coherence length has an effect on the far- field intensity distribution and the beam width induced by atmospheric turbulence of the laser beam. Besides, the degree of polarization of the electromagnetic Gaussian multi- Schell model beams can change with the propagation distance, and it can reach a certain value when the laser beam propagates through atmospheric turbulence in a slant path. This result indicates potential applications for satellite- to- ground or ground- to- satellite laser communications.

关 键 词：光通信 星地激光通信 光束展宽 光束漂移 

分 类 号：TN929.1[电子电信—通信与信息系统]