Propagation of Asymmetric Bessel Mode in Turbulent Atmosphere

Aiming at asymmetric Bessel mode, we investigate the propagation characteristics of vortex mode in atmospheric turbulence. The theoretical expressions of mode detection probability are derived for signal and crosstalk modes, based on which channel capacity is further analyzed. The detection probability distribution is mainly affected by mode wavelength and asymmetric factor. The increment of asymmetric factor can diversify the transverse mode intensity pattern, but cause the decline of signal probability and channel capacity. To improve channel capacity, longer wavelength and more transmitted modes are beneficial, while the adjustments of mode topological charge and Bessel cone angle have no effect. Besides, the influences of atmospheric turbulence conditions are discussed. The results are referential for exploring the use of asymmetric Bessel mode as signal source.