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Proceedings Paper

Beam quality in unstable optical resonators and the effects of misalignment
Author(s): M. H. Mahdieh; M. Shirmahi; M. Alavi-Nejad
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Paper Abstract

In this paper, we have calculated the beam quality of practical unstable resonators under a variety of practical conditions. The effects of resonator geometrical parameters and misalignment were evaluated. Based on the Fresnel-Kirchhoff integral, the two-dimension phase and intensity have been calculated for practical positive branch unstable resonators. Using Second Order Moment (SOM) technique, Μ2 factor for such resonator was estimated. The results show that the beam quality is very sensitive to misalignment of the resonator. We also show that Μ2 factor increases with Fresnell number, while it decreases with magnification.

Paper Details

Date Published: 10 December 2005
PDF: 8 pages
Proc. SPIE 6157, Workshop on Laser Applications in Europe, 61570X (10 December 2005); doi: 10.1117/12.651211
Show Author Affiliations
M. H. Mahdieh, Iran Univ. of Science and Technology (Iran)
M. Shirmahi, Iran Univ. of Science and Technology (Iran)
M. Alavi-Nejad, Iran Univ. of Science and Technology (Iran)


Published in SPIE Proceedings Vol. 6157:
Workshop on Laser Applications in Europe

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