Abstract:

       We present the partially coherent nature of the annulus vortex beams based on the transmission theory of partially coherent light. We also make a detailed analysis for the annulus vortex beam. We further discover the impact of the change of the relative width s/w0 and the topological charge intensity distribution number m on light intensity distribution in z=0 section. We give the overlapped coherent vortex of two parallel and off-axis partially coherent beams. We eventually analyze the change of light intensity in a overlapped field with the relative distance from axis d/w0 and the coherent parameter α. Moreover, composite coherent light vortex will change into composite light vortex when the paremeter α approaches infinity.

Key words: singularity optics, annulus vortex, composite coherent vortex