Transformation of a High Order Mode Intensity Distribution to a Nearly Gaussian beam

G. Machavariani, N. Davidson, A. A. Ishaaya, A. A. Friesem, E. Hasman

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

A simple method for obtaining a nearly Gaussian laser beam from a high order Hermite-Gaussian mode is presented. The method is based on separating the equal lobes of the high order mode and combining them together coherently. The method was experimentally verified with an arrangement of three mirrors, a 50% beam splitter and a phase tuning plate. The beam quality factor calculated in x-direction for the resulting output beam is 1.045, being very close to that of ideal Gaussian beam. The calculated power leakage is only 1.5 %. The experimental near-field and far-field intensity distributions of the output beam have nearly Gaussian cross sections in both the x and the y directions, with M2x=1.34 and M2y=32. With some modifications, it is possible to obtain an output beam with M2 x=1.15 and no power leakage.

Original languageEnglish
Pages (from-to)271-275
Number of pages5
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5147
DOIs
StatePublished - 1 Dec 2003
Externally publishedYes
EventALT'02 International Conference on Advanced Laser Technologies - Adelboden, Switzerland
Duration: 15 Sep 200220 Sep 2002

Keywords

  • Beam quality
  • Beam shaping
  • Interference
  • Laser beams
  • Mode selection
  • Phase elements

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