Propagation of flat-topped beams

The propagation of flat-topped beams passing through paraxial ABCD optical system is investigated based on the propagation formulas of Gaussian beam. The focal shift of focused coherent flat-topped beam is also studied in detail. Analytical expressions of the M 2 factor and the far-field intensity d...

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Bibliographic Details
Published in:Optics and laser technology 2008-04, Vol.40 (3), p.494-498
Main Authors: Wu, Guohua, Lou, Qihong, Zhou, Jun, Dong, Jingxing, Wei, Yunrong, Su, Zhouping
Format: Article
Language:English
Subjects:
Beam characteristics: profile, intensity, and power
spatial pattern formation
Beam quality
Exact sciences and technology
Flat-topped beam
Focal shift
Fundamental areas of phenomenology (including applications)
Geometrical optics
Laser optical systems: design and operation
Optics
Physics
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Summary:The propagation of flat-topped beams passing through paraxial ABCD optical system is investigated based on the propagation formulas of Gaussian beam. The focal shift of focused coherent flat-topped beam is also studied in detail. Analytical expressions of the M 2 factor and the far-field intensity distribution for flat-topped beams are derived on the basis of second-order moments.
ISSN:0030-3992
1879-2545
DOI:10.1016/j.optlastec.2007.08.001