Scintillation reduction for combined Gaussian-vortex beam propagating through turbulent atmosphere

Autor:	Berman, G. P., Gorshkov, V. N., Torous, S. V.
Rok vydání:	2011
Předmět:	Physics - Optics Physics - Atmospheric and Oceanic Physics Physics - Computational Physics Physics - Instrumentation and Detectors
Druh dokumentu:	Working Paper
DOI:	10.1117/12.876218
Popis:	We numerically examine the spatial evolution of the structure of coherent and partially coherent laser beams (PCBs), including the optical vortices, propagating in turbulent atmospheres. The influence of beam fragmentation and wandering relative to the axis of propagation (z-axis) on the value of the scintillation index (SI) of the signal at the detector is analyzed. A method for significantly reducing the SI, by averaging the signal at the detector over a set of PCBs, is described. This novel method is to generate the PCBs by combining two laser beams - Gaussian and vortex beams, with different frequencies (the difference between these two frequencies being significantly smaller than the frequencies themselves). In this case, the SI is effectively suppressed without any high-frequency modulators. Comment: 13 pages, 8 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1101.2997 Zobrazit plný text záznamu View this record from Arxiv