| Abstract
| - Abstract. Based on the geometrical optics approximation, the influences of some optical component aberrations of confocal unstable resonators on the laser beam divergence are discussed. The explicit dependence of the laser beam divergence on the cavity magnification, the structure of the mirror defects, the mirror curvature radii and the tilting angle of intracavity windows are given for both positive- and negative-branch resonator configurations.
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