Propagation of Lorentz-Gaussian elliptical multi-Gaussian correlated Schell-Model beam in anisotropic turbulence

The beam spreading, spectral degree of coherence and evolution behavior of the intensity profile of partially coherent Lorentz-Gaussian elliptical multi-Gaussian correlation Schell-Model beam propagating in anisotropic atmospheric turbulence are studied. The analytical expressions of cross-spectral density function, as well as root mean square (rms) beam width, are derived based on the extended Huygens-Fresnel principle and the relationship of Lorentz distribution and Hermitian Gaussian function. With the increases of propagation distance, the elliptical beam will first evolve into Gaussian beam and then change back to elliptical beam. In anisotropic atmo-spheric turbulence, the influence of the inner scale of turbulence on the spectral degree of coherence and rms beam width are obviously greater than that of the outer scale. For Lorentz -Gaussian elliptical multi-Gaussian correlated Schell-Model beams, better propagation perfor-mance was found in anisotropic atmospheric turbulence with larger anisotropic factor and smaller inner scale.

Automated summary

The beam spreading, spectral degree of coherence, and intensity profile evolution of partially coherent Lorentz-Gaussian elliptical multi-Gaussian correlation Schell-Model beams propagating in anisotropic atmospheric turbulence were studied. Analytical expressions for the cross-spectral density function and root mean square beam width were derived. As the propagation distance increases, the elliptical beam first evolves into a Gaussian beam and then returns to an elliptical beam. In anisotropic atmospheric turbulence, the inner scale of turbulence has a greater impact on the spectral degree of coherence and beam width than the outer scale. Lorentz-Gaussian elliptical multi-Gaussian correlated Schell-Model beams exhibit better propagation performance in anisotropic atmospheric turbulence with a larger anisotropic factor and smaller inner scale.