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Proceedings Paper

Tilt correction for intracavity mirror of laser with an unstable resonator
Author(s): Xiang Zhang; Bing Xu; Wei Yang
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Paper Abstract

The influence on outcoupled mode by introducing intracavity tilt-perturbation in confocal unstable resonator is analyzed. The intracavity mode properties and Zernike-aberration coefficient of intrcavity mirror's maladjustment are calculated theoretically. The experimental results about the relations of intracavity mirror maladjustment and the properties of mode aberration are presented by adopting Hartmann-Shack wavefront sensor. The results show that the intracavity perturbation of the concave mirror has more remarkable effect on outcoupled beam-quality than that of the convex mirror. For large Fresnel-number resonator, the tilt angle of intracavity mirror has a close linear relationship with extracavity Zernike tilt coefficient. The ratio of tilt aberration coefficient approaches to the magnification of unstable resonator if equivalent perturbation is applied to concave mirror and convex mirror respectively. Furthermore, astigmatism and defocus aberration also increase with the augment of tilt aberration of beam mode. So intracavity phase-corrected elements used in unstable resonator should be close to the concave mirror. Based these results, a set of automatic control system of intracavity tilt aberration is established and the aberration-corrected results are presented and analyzed in detail.

Paper Details

Date Published: 8 June 2006
PDF: 10 pages
Proc. SPIE 6018, 5th International Workshop on Adaptive Optics for Industry and Medicine, 60180K (8 June 2006); doi: 10.1117/12.669284
Show Author Affiliations
Xiang Zhang, Institute of Optics and Electronics (China)
Graduate School of Chinese Academy of Sciences (China)
Bing Xu, Institute of Optics and Electronics (China)
Wei Yang, Institute of Optics and Electronics (China)
Graduate School of Chinese Academy of Sciences (China)


Published in SPIE Proceedings Vol. 6018:
5th International Workshop on Adaptive Optics for Industry and Medicine
Wenhan Jiang, Editor(s)

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