利用相位型衍射光栅生成能量按比例分布的多个螺旋光束的研究  

Generation of helical beams with pre-determined energy distribution based on phase modulation gratings

作　　者：齐晓庆[1] 高春清[1] 刘义东[2] 

机构地区：[1]北京理工大学光电学院,北京100081 [2]电子科技大学物理电子学院,成都610054

出　　处：《物理学报》2010年第1期264-270,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:60778002);教育部"新世纪优秀人才"计划资助的课题~~

摘　　要：研究了基于计算全息光栅的方法产生能量按比例分布的多个螺旋光束的技术.在计算全息光栅的过程中引入了Gerchberg-Saxton迭代算法,并在此基础上利用位相型空间光调制器产生了具有轨道角动量态的多种光束,实现了多个指定轨道角量子数的螺旋光光场分布.给出了计算机仿真结果和实验结果,表明利用Gerchberg-Saxton迭代算法生成的位相型光栅可以生成多个指定轨道角动量量子数的光束,研究结果对于利用轨道角动量进行信息传输有益.The generation of helical beams with different pre-determined orbital angular momentum states based on computer-generated holograms is studied. The phase-type diffraction gratings are designed by using the Gerchberg-Saxton iterative method, and realized by using the spatial light modulator （SLM）. In the experiments diffraction fields with different helical beams distribution are obtained by using the gratings. The theoretical simulation agrees with the experimental results. This method is meaningful for the information transmission based on the orbital angular momentum.

关 键 词：轨道角动量 螺旋光束 Gerchberg—Saxton迭代算法 计算全息光栅 

分 类 号：O436.1[机械工程—光学工程] TN248[理学—光学]