多通螺旋相位板的涡旋光拓扑荷数4重加倍  

Quadrupling topological charges of vortex using multi-passed spiral phase plate

作　　者：王琛 刘通 邵琼玲 任元 苗继松 Wang Chen;Liu Tong;Shao Qiongling;Ren Yuan;Miao Jisong(Department of Aerospace Science and Technology,Space Engineering University,PLA Strategic Support Force,Beijing 101416,China)

机构地区：[1]中国人民解放军战略支援部队航天工程大学宇航科学与技术系,北京101416

出　　处：《红外与激光工程》2018年第9期340-345,共6页Infrared and Laser Engineering

基　　金：国家自然科学基金(11772001);国家863计划(2015AA8018038C)

摘　　要：为了制备大拓扑荷数涡旋光,对基于螺旋相位板多通的拓扑荷数4重加倍进行了理论分析、仿真模拟和实验验证。根据菲涅耳衍射积分定理,推导了基于螺旋相位板多通的涡旋光拓扑荷数加倍原理。设计了4重加倍装置,建立了相应模型并模拟了拓扑荷数4重加倍后的涡旋光强分布。绘制了相对强度、光束半径随距离变化曲线,得到了加倍过程中半径和强度不会发生突变的结论。最后,使用该装置成功制备了拓扑荷数为4、8、12、16的涡旋光束并对该实验中高阶涡旋光质量较差的原因进行了分析。In order to generate optical vortex with high topological charges,theoretical analysis,simulations and experimental demonstration of quadrupling topological charges of vortex based on spiral phase plate were presented.According to Fresnel diffraction integral,theory of quadrupling topological charges was analyzed.Setup of quadrupling topological charges based on one spiral phase plate was designed,then mathematical model was built and relative intensity of vortex after quadrupling was simulated.Simulated graphs of relative intensity and optical radius were plotted,the radius and intensity were smoothly changed during the quadrupling.Finally,vortices with topological charges 4,8,12,16 were generated and the reason why vortices with high topological charges generated by quadrupling were of poor quality was analyzed.

关 键 词：涡旋光 螺旋相位板 拓扑荷数 偏振 菲涅耳衍射 

分 类 号：O435[机械工程—光学工程]