新型部分相干光束通过光阑的传输特性研究  

Propagation characteristics of novel partially coherent light beams through an optical system with an aperture

作　　者：胡羽 毛海丹[1] HU Yu;MAO Haidan(Hangzhou Dianzi University,Hangzhou 310018,China)

机构地区：[1]杭州电子科技大学理学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2024年第3期59-65,共7页Journal of Hangzhou Dianzi University：Natural Sciences

基　　金：国家自然科学基金资助项目(12004091);浙江省自然科学基金资助项目(LY19A040011)。

摘　　要：本文针对新型部分相干光束在受光阑限制的透镜系统中传输,通过硬边光阑展开成有限项复高斯函数之和,并理论推导,得到了具有相位调控时谱密度的简便传输方程;在matlab中采用快速傅里叶变换进行数值计算,分析不同光阑大小和相位调控参数对二阶三次方相位调控的新型部分相干光束的传输特性的影响。研究结果表明:不同光阑大小对新型部分相干光束在焦平面的谱密度影响较小,但不同相位调控参数对新型部分相干光束在焦平面的谱密度影响较大;二阶三次方相位调控的新型部分相干光束具有一定的自愈特性。这种新型光束在恶劣环境光通信领域具有潜在应用。By expanding the hard-edged aperture into the sum of complex Gaussian functions with finite terms,a simple propagation equation is theoretically derived for the spectral density of a novel partially coherent beam with phase manipulation through an apertured lens.The influence of aperture size and phase manipulation parameter on propagation characteristics of a novel partially coherent beam is analyzed numerically by using fast Fourier transform in matlab.Results show that different size of aperture has little effect while different phase manipulation parameter has great effect on the spectral density of the novel partially coherent beam in the focal plane.The novel partially coherent beam with second-order cubic phase manipulation has self-healing property and has potential application in the field of optical communication in harsh environment.

关 键 词：复相干结构 光阑 谱密度 部分相干光束 传输方程 

分 类 号：O4[理学—物理]