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Proceedings Paper

Estimation of beam parameters and coherence properties of laser radiation by use of an extended Hartmann-Shack wavefront sensor
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Paper Abstract

A combination of a Hartmann-Shack sensor and a standard far-field measurement on one single detector is proposed. The technique is fast, manages without moveable parts, thus permitting a very compact design. It is not only suited for characterization of the wave-front distribution, but may also be considered for determination of the important parameters beam width, beam divergence and beam propagation ratio M2 of partially coherent laser beams. The experimental results in combination with findings from error analysis and numerical simulations indicate that a fairly thorough beam characterization including spatial coherence, propagation characteristics and beam quality can be achieved with this method, if a high resolution H.-S. sub-system with efficient crosstalk reduction is used.

Paper Details

Date Published: 30 May 2003
PDF: 12 pages
Proc. SPIE 4932, Laser-Induced Damage in Optical Materials: 2002 and 7th International Workshop on Laser Beam and Optics Characterization, (30 May 2003); doi: 10.1117/12.472040
Show Author Affiliations
Bernd Schaefer, Laser-Lab. Goettingen e.V. (Germany)
Klaus R. Mann, Laser-Lab. Goettingen e.V. (Germany)


Published in SPIE Proceedings Vol. 4932:
Laser-Induced Damage in Optical Materials: 2002 and 7th International Workshop on Laser Beam and Optics Characterization
Gregory J. Exarhos; Arthur H. Guenther; Norbert Kaiser; Keith L. Lewis; M. J. Soileau; Christopher J. Stolz; Adolf Giesen; Horst Weber, Editor(s)

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