30 May 2003 Estimation of beam parameters and coherence properties of laser radiation by use of an extended Hartmann-Shack wavefront sensor
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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.
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Bernd Schaefer, Bernd Schaefer, Klaus R. Mann, Klaus R. Mann, } "Estimation of beam parameters and coherence properties of laser radiation by use of an extended Hartmann-Shack wavefront sensor", 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; https://doi.org/10.1117/12.472040
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