光束轨道角动量的本征态可实现高维量子信息的传输,将此特性用于信息的编码, 可以提高数据编码的密度。 提出了对八台阶结构相位编码的方法,根据相位旋转角的不同,来控制入射光束的相位延迟,进而实现相位 信息的编码。讨论了基模高斯光束经过不同台阶后的螺旋谱分布,通过阵列功率探测器检测特定编码台阶结 构对应的螺旋谱,区分不同的编码数据态,实现相位信息的解码。每个存储单元理论上可编码24 bits数据信息,是四台阶结构编码信息的3倍。

The transmission of high-dimensional quantum information can be achieved by the eigenstates of the beam’s orbital angular momentum, which can be used for information encoding to increase the data storage density. The phase encoding method of the eight quadrant staircase structure which depends on the phase rotation angle of the incident light beam to control the phase delay is presented, thus realizing the code phase information. The distribution of the spiral spectrum that the incident beam passes through different quadrant staircase structures, and detects the spiral spectrum by the array power detector corresponding to the particular coding quadrant staircase structure, distinguishes different data states and finally achieves the decode of the phase information. Each memory cell can theoretically encode 24 bits data, which is three times the four quadrant staircase structure.