[00122411]产生完美涡旋阵列的二维编码相位光栅

一种产生完美涡旋阵列的二维编码相位光栅,该光栅为纯相位结构光栅中编码载入涡旋相位和角锥相位而成,所产生的衍射光场的不同衍射级次上携带有不同拓扑荷的涡旋相位和不同发散度的角锥相位。通过所述二维编码相位光栅在其傅立叶变换面上可以同时产生多个携带不同拓扑荷的环形光斑阵列,并且这些环形光斑大小相等。这种具有不同拓扑荷、相同大小的环形完美涡旋在光纤通信轨道角动量复用方面具有重要的应用前景。 | Disclosed is a two-dimensional coding phase grating generating a perfect vortex array. The grating is composed of coding loading vortex phases and pyramid phases in the pure-phase structure raster, different diffraction levels of a generated diffraction light field carry vortex phases of different topological loads and pyramid phases of different divergence. By the two-dimensional coding phase raster on the Fourier transform plane, annular light spot arrays carrying different topological loads are produced at the same time. Further, the sizes of the annular light spot arrays are equal. The two-dimensional coding phase raster with different topological loads and same size of annular perfect vortexes has important application prospect in the multiplexing aspect of orbital angular momentum of optical fiber communications。