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Proceedings Paper

Investigation of variable reflecting mirrors effects in beam quality of unstable optical resonators
Author(s): M. H. Mahdieh; M. Shirmahi; M. Lafooti
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Paper Abstract

In this paper the performance of a positive branch unstable resonator under different conditions has been investigated. Using variable reflective mirror (VRM) in this resonator, wave front phase and electric field are evaluated numerically. Based on the Fresnel-Kirchhoff integral, the phase and intensity across the output mirror were calculated. Gaussian Reflecting Mirror (GRM) as well as super-Gaussian has been considered for the resonator front mirror and the results are compared with those of ordinary hard edge mirror. Variety of geometrical conditions for resonator was considered in these simulations and the behavior of resonator under different Fresnel numbers N and magnification M were evaluated. In the calculations the effect of finite misalignment on the front mirror was also assessed and the beam quality was inspected for each case. The energy extraction was also estimated for each condition by calculating Finesse.

Paper Details

Date Published: 26 April 2007
PDF: 8 pages
Proc. SPIE 6346, XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 63461Y (26 April 2007); doi: 10.1117/12.738863
Show Author Affiliations
M. H. Mahdieh, Iran Univ. of Science and Technology (Iran)
M. Shirmahi, Iran Univ. of Science and Technology (Iran)
M. Lafooti, Iran Univ. of Science and Technology (Iran)


Published in SPIE Proceedings Vol. 6346:
XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers

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