Propagation of rectangular multi-Gaussian Schell-model vortex beams in turbulent atmosphere
Abstract
Based on the extended Huygens-Fresnel integral, the analytical expression of average intensity of a rectangular multi-Gaussian Schell-model vortex (RMGSMV) beam propagating in turbulent atmosphere is derived, the effects of turbulent atmosphere on the average intensity and effective beam widths of a RMGSMV beam are analyzed. The numerical results indicate that the RMGSMV beam propagating in turbulent atmosphere will gradually evolve from the dark hollow beam into a solid beam with Gaussian-like distribution, and the effective beam width Wxz of a RMGSMV beam propagating in turbulent atmosphere with larger Cn2 will have a larger beam width. The results also show that the effective beam width of a RMGSMV beam with smaller σ, larger M and N1=N2 will have a larger effective beam width as the propagation distance increases.
- Publication:
-
Optik
- Pub Date:
- April 2020
- DOI:
- 10.1016/j.ijleo.2019.163809
- Bibcode:
- 2020Optik.20763809D
- Keywords:
-
- Multi-Gaussian Schell-model beam;
- Vortex beam;
- Average intensity;
- Turbulent atmosphere