Simulation of effects of beam wander on scintillation index of a focused Gaussian-beam

qian xian-mei; zhu wen-yue; rao rui-zhong

Volume 19 Issue 02

Feb. 2007

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Article Navigation > High Power Laser and Particle Beams > 2007 > 19(02): 0-

tang enling, zhang qingming, zhang jian. Conductivity measurement of an expanding plasma cloud generated by hypervelocity impact LY12 aluminum target[J]. High Power Laser and Particle Beams, 2009, 21.

Citation:

qian xian-mei, zhu wen-yue, rao rui-zhong. Simulation of effects of beam wander on scintillation index of a focused Gaussian-beam[J]. High Power Laser and Particle Beams, 2007, 19.

Citation:

qian xian-mei, zhu wen-yue, rao rui-zhong. Simulation of effects of beam wander on scintillation index of a focused Gaussian-beam[J]. High Power Laser and Particle Beams, 2007, 19.

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Simulation of effects of beam wander on scintillation index of a focused Gaussian-beam

1.
Laboratory of Atmospheric Optics,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,P.O.Box 1125,Hefei 230031,China

Publish Date: 2007-02-15

Abstract

Abstract

The propagation of a focused Gaussian beam through turbulent atmosphere is simulated by using non-adaptive coordinate transformation. The first-order weak-fluctuation Rytov theory predicts that the on-axis scintillation index would become significantly smaller as the initial beam width increases. But the simulation results show that there is no great reduction of on-axis scintillation index. This discrepancy is due to the fact that Rytov theory does not correctly account for the effects of beam wander caused by large scale turbulence. Simulation results are in good agreement with beam wander theory results and experimental data. It can be concluded that Rytov theory could not correctly calculate the scintillation index of a focused beam and the effects of beam wander should be taken into a
- laser propagation,
- turbulent atmosphere,
- numerical simulation,
- focused gaussian beam,
- scintillation,
- beam wander

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