摘要
The propagation of vortex beam in atmospheric turbulence is of significant importance in theoretical study and practical applications. Based on extended Huygens-Fresnel integral and the Rytov approximation, the average capacity of orbital angular momentum(OAM)-multiplexed Laguerre-Gaussian(LG) beam propagating through non-Kolmogorov turbulence is presented, and the analytical expression of spiral spectrum of LG beam has been deduced. The average capacity of FSO system is numerically calculated and the influence of exponent parameter, transmission height, structure constant, wavelength, outer scale and inner scale on average capacity are also analyzed in detail. Outcomes show that smaller structure constant, outer scale, higher transmission height and larger wavelength, inner scale are conducive to improve average capacity in different extent. Results acquires in this paper have potential application value in optical communication within non-Kolmogorov turbulence.
The propagation of vortex beam in atmospheric turbulence is of significant impor- tance in theoretical study and practical appli- cations. Based on extended Huygens-Fresnel integral and the Rytov approximation, the average capacity of orbital angular momentum （OAM）-multiplexed Laguerre-Gaussian （LG） beam propagating through non-Kolmogorov turbulence is presented, and the analytical expression of spiral spectrum of LG beam has been deduced. The average capacity of FSO system is numerically calculated and the in- fluence of exponent parameter, transmission height, structure constant, wavelength, outer scale and inner scale on average capacity are also analyzed in detail. Outcomes show that smaller structure constant, outer scale, higher transmission height and larger wavelength, inner scale are conducive to improve average capacity in different extent. Results acquires in this paper have potential application value in optical communication within non-Kolmog- orov turbulence.
基金
supported by the National Science Fund for Distinguished Young Scholars of China (Grant No. 61225003)
National Natural Science Foundation of China (Grant No. 61101005 and No. 61471051)
Beijing Higher Education Young Elite Teacher Project
