扭转对称光束的产生及其变换过程中的轨道角动量传递  

Generation of twisted stigmatic beam and transfer of orbital angular momentum during the beam transformation

作　　者：高明伟[1] 高春清[1] 林志锋[1] 

机构地区：[1]北京理工大学光电工程系,北京100081

出　　处：《物理学报》2007年第4期2184-2190,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:69908001);教育部博士点基金(批准号:20050007027)资助的课题.~~

摘　　要：研究了采用扭转柱面镜光学系统将厄米-高斯光束变换成为具有轨道角动量的拉盖尔-高斯扭转对称光束.采用本征模式分解的方法分析了扭转柱面镜光学变换系统实现光束变换的原理.利用光束传输矩阵和二阶矩理论分析计算了光束经过扭转柱面透镜变换过程中的轨道角动量传递过程,证明光束与透镜系统的轨道角动量交换发生在第一个柱面透镜处,光束经过第一个柱面透镜后,具有的轨道角动量保持不变.The twisted stigmatic beam with orbital angular momentum generated by transforming the Hermite-Gaussian beam through a rotated cylindrical lens system was studied. By utilizing of method of mode decomposition, the theory of transformation was analyzed. The transfer of orbital angular momentum during beam transformation was analyzed using beam transforming matrix and Collins integral. It was found that the angular momentum transfer takes place at the first cylindrical lens and remains constant after that.

关 键 词：轨道角动量 光束变换 扭转对称光束 轨道角动量传递 

分 类 号：O431.2[机械工程—光学工程]