Beam combination of a radial laser array: Flat-topped beam

An analytical expression of a radial laser array for flat-topped beam is derived based on the generalized Collins formula. The intensity distribution of the resulting beam focused by a lens at the focus plane, for phase-locked and nonphase-locked cases, is studied numerically. The effect of the Fres...

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Bibliographic Details
Published in:Optics and laser technology 2008-10, Vol.40 (7), p.890-894
Main Authors: Wu, Guohua, Lou, Qihong, Zhou, Jun, Dong, Jingxing, Wei, Yunrong
Format: Article
Language:English
Subjects:
Beam characteristics: profile, intensity, and power
spatial pattern formation
Beam combination
Exact sciences and technology
Flat-topped beam
Fresnel number
Fundamental areas of phenomenology (including applications)
Laser optical systems: design and operation
Optics
Physics
Wave optics
Wave propagation, transmission and absorption
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Summary:An analytical expression of a radial laser array for flat-topped beam is derived based on the generalized Collins formula. The intensity distribution of the resulting beam focused by a lens at the focus plane, for phase-locked and nonphase-locked cases, is studied numerically. The effect of the Fresnel number and normalized radius on intensity distribution for phase-locked and nonphase-locked cases is also presented. It is found that intensity distribution for nonphase-locked case is much less sensible to the Fresnel number and normalized radius than that of phase-locked case.
ISSN:0030-3992
1879-2545
DOI:10.1016/j.optlastec.2008.01.017