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Average spreading of a radial Gaussian beam array in non-Kolmogorov turbulence

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Abstract

The analytical expression for the rms beam width of the radial Gaussian beam array propagating in non-Kolmogorov turbulence is derived, where the coherent combination is considered. The influences of the beam number, the generalized exponent, and the ring radius on the rms beam width are investigated. The results indicate that the rms beam width depends greatly on the generalized exponent and the beam number. Further, an optimum ring radius, which leads to a minimum beam width, is proved to exist within a certain traveling distance and the optimum ring radius increases when the beam number increases.

© 2011 Optical Society of America

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