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Analysis of the beam quality of a multi-Gaussian Schell-model vortex beam in atmospheric turbulence

Suo Qiangbo, Cui Zhiwei, Han Yiping

Optica Applicata

2019

Vol. 49, nr 2

191--202

Analytical formulas of the angular width and propagation factor of a multi-Gaussian Schell-model vortex (MGSMV) beam through atmospheric turbulence are derived on the basis of the extended Huygens–Fresnel integral and second-order moments of Wigner distribution function. Evolution properties of the angular width and propagation factor of MGSMV beams propagating in atmospheric turbulence are investigated numerically. The results show that a multi-Gaussian Schell-model beam is more affected by atmospheric turbulence than a MGSMV beam, which will be useful for the practical application of the MGSMV beam.

Laser Beam Attenuation Determined by the Method of Available Optical Power in Turbulent Atmosphere

Dordov´a L., Wilfert O.

Journal of Telecommunications and Information Technology

2009

nr 2

53-57

This work is focused on the atmospheric turbulence effect and a new method for determining optical signal attenuation caused by turbulence is presented here. A new method of power budget of optical links comes from optical intensity distribution in a laser beam after the beam passed through turbulent atmosphere. Results given by this method are compared with Rytov approximation which is nowadays the most frequently used method for determining turbulent attenuation. Results for communication wavelength of 850 nm and 1550 nm are presented as well as the results for a wavelength of 633 nm.