高斯涡旋光束分析及其在中继镜系统中的应用  

Analysis of Gaussian-Vortex Beam and Its Application in a Relay Mirror System

作　　者：吴慧云[1] 黄值河[1] 吴武明[1] 许晓军[1] 陈金宝[1] 赵伊君[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,湖南长沙410073

出　　处：《光学学报》2011年第4期175-179,共5页Acta Optica Sinica

摘　　要：提出了一种以高斯涡旋光束作为光源,实现中继镜系统上行链路能量损耗有效降低的新方法。计算了以高斯光束为光源的30km高度中继镜系统上行链路能量损耗情况,结果是,系统上行链路的能量耦合效率为76.48%,接收望远镜次镜阻挡作用造成了主要能量损耗,阻挡损耗的能量占总能量的22.85%。分析了涡旋光束中心暗核大小及形态与光束参数的关系,结果是,暗核的形状由光束相位涡旋量决定,仅当光束相位涡旋量为2π整数倍时,暗核为圆形;暗核的口径大小分别随着光束相位涡旋量的增加和光束传输距离的增加而增加。计算了以高斯涡旋光束作为光源的30km高度中继镜系统上行链路能量损耗情况,结果是,以高斯涡旋光束作为光源时,系统的能量耦合效率可达到97.25%,有效地降低了系统上行链路的能量损耗。A new method that decreases the power loss in uplink propagation of a relay mirror system by using a Gaussian-vortex beam source is proposed. Performance of a 30 km-altituide relay mirror system that uses a Gaussian beam source is calculated. Results show that power coupling efficiency of uplink propagation in the relay mirror system is 76.48%, beam blocked by secondary mirror of the receiving telescope causes the main power loss and power loss proportion caused by beam blocking is 22.85 %. Relation between shape and aperture of the dark area generated at the center of a Gaussian-vortex beam with parameters of the beam are analyzed in detail. Results show that shape of the hollow area is determined by amount of phase vortex of the beam, the hollow area is circular only when amount of phase vortex is times of 2n, aperture of the dark hollow increases with the increase of amount of phase vortex and propagation distance, respectively. Performance of a 30 km-altituide relay mirror system that uses a Gaussian-vortex beam source is calculated. Results show that power coupling efficiency of uplink propagation in the relay mirror system is 97.25 %, and power loss in uplink propagation is significantly decreased.

关 键 词：激光技术 涡旋光束 中继镜系统 能量耦合效率 上行传输 

分 类 号：O43[机械工程—光学工程] TJ95[理学—光学]