Research on partially coherent flat-topped vortex hollow beam propagation in turbulent atmosphere.

In this paper, the aperture averaged scintillation, mean signal-to-noise ratio (SNR), and average bit error rate (BER) for the partially coherent flat-topped vortex hollow beams propagating in turbulent atmosphere are evaluated. The variation of the aperture averaged scintillation against the coherence length of the beams and size of the receiver aperture is studied. It is also found that the aperture averaged scintillation increases with the topological charge of the partially coherent flat-topped vortex hollow beams. The partially coherent flat-topped vortex hollow beam with the smaller beam order has advantage to resist the effect of the turbulence. We also investigated the variation of the mean SNR and average BER against the coherence length.