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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Veröffentlicht in:	Optics and laser technology 2008-04, Vol.40 (3), p.494-498
Hauptverfasser:	Wu, Guohua, Lou, Qihong, Zhou, Jun, Dong, Jingxing, Wei, Yunrong, Su, Zhouping
Format:	Artikel
Sprache:	eng
Schlagworte:	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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Beschreibung
Zusammenfassung:	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