激光与光电子学进展, 2014, 51 (5): 050601, 网络出版: 2014-04-11
湍流大气中激光通信系统接收光功率的优化研究
Optimal Selection of Receiving Optical Power in Laser Communication System in Atmospheric Turbulence
激光通信 功率损耗 大气湍流 光束漂移 光束扩展 laser communication power loss atmosphere turbulence beam drift beam expanding
摘要
以部分相干高斯-谢尔模型(GSM)光束为例,对湍流引起的漂移方差和扩展角进行模拟,综合考虑由光束漂移引起的瞄准误差和光束扩展引起的接收光功率密度的整体下降,对激光通信链路中接收端光功率进行数值计算和分析,找出激光通信系统中最佳发射光束的参数。研究结果表明,湍流大气中激光通信系统最佳发射光束的参数与光束的束腰半径、空间相干长度、波长、传播距离和湍流强度有关。部分相干GSM 光束接收端光功率随着波长、光束束腰、空间相干长度和传输距离的变化存在一最优值。
Abstract
Taking partially coherent Gaussian- Schell model (GSM) beam as an example to get the best launch parameters of laser communication system, considering overall decline of the alignment adaption loss caused by beam drift and decrease of receiving optical power density induced by beam expanding, some numerical calculation and analysis on the receiving power in the laser link are necessary. Results represent that in atmospheric turbulence the best launch parameters of laser communication system are related to beam waist radius, spatial coherent length, wavelength, propagation distance and turbulence intensity. There exists an optimal value when the receiving power density of the partially coherent GSM beam changes with the variance of the wavelength, beam width, degree of coherence and transmission distance.
高铎瑞, 付强, 赵昭. 湍流大气中激光通信系统接收光功率的优化研究[J]. 激光与光电子学进展, 2014, 51(5): 050601. Gao Duorui, Fu Qiang, Zhao Zhao. Optimal Selection of Receiving Optical Power in Laser Communication System in Atmospheric Turbulence[J]. Laser & Optoelectronics Progress, 2014, 51(5): 050601.