Beam quality in unstable optical resonators and the effects of misalignment

M. H. Mahdieh; M. Shirmahi; M. Alavi-Nejad

doi:10.1117/12.651211

9 December 2005 Beam quality in unstable optical resonators and the effects of misalignment

M. H. Mahdieh, M. Shirmahi, M. Alavi-Nejad

Proceedings Volume 6157, Workshop on Laser Applications in Europe; 61570X (2005) https://doi.org/10.1117/12.651211
Event: EPIC/SPIE Workshop on laser applications in Europe, 2005, Dresden, Germany

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.

Citation Download Citation

M. H. Mahdieh, M. Shirmahi, and M. Alavi-Nejad "Beam quality in unstable optical resonators and the effects of misalignment", Proc. SPIE 6157, Workshop on Laser Applications in Europe, 61570X (9 December 2005); https://doi.org/10.1117/12.651211

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