Propagation of phase-locked truncated Gaussian beam array in turbulent atmosphere

doi:10.1088/1674-1056/19/2/024205

Abstract Truncation manipulation is a simple but effective way to improve the intensity distribution properties of the phase-locked Gaussian beam array at the receiving plane. In this paper, the analytical expression for the propagation of the phase-locked truncated Gaussian beam array in a turbulent atmosphere is obtained based on the extended Huygens--Fresnel principle. Power in the diffraction-limited bucket is introduced as the beam quality factor to evaluate the influence of different truncation parameters. The dependence of optimal truncation ratio on the number of beamlets, the intensity of turbulence, propagation distance and laser wavelength is calculated and discussed. It is revealed that the optimal truncation ratio is larger for the laser array that contains more lasers, and the optimal truncation ratio will shift to a larger value with an increase in propagation distance and decrease in intensity of atmosphere turbulence. The optimal truncation ratio is independent of laser wavelength.

Keywords: laser array phase locking truncation propagation turbulence

Received: 30 March 2009
Revised: 23 July 2009
Accepted manuscript online:

PACS:	42.68.Ay	(Propagation, transmission, attenuation, and radiative transfer)
	42.68.Bz	(Atmospheric turbulence effects)
	42.60.Jf	(Beam characteristics: profile, intensity, and power; spatial pattern formation)

Fund: Project supported by the Innovation Foundation for Postgraduate of Hunan Province.

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Zhou Pu(周朴), Liu Ze-Jin(刘泽金), Xu Xiao-Jun(许晓军), and Chu Xiu-Xiang(储修祥) Propagation of phase-locked truncated Gaussian beam array in turbulent atmosphere 2010 Chin. Phys. B 19 024205

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