2002/05/20 by Bernd Schäfer, Klaus Mann · 4 citations
Physics and Astronomy · Engineering · #Adaptive optics and wavefront sensing #Optical Systems and Laser Technology #Laser Material Processing Techniques
paper · doi:10.1364/ao.41.002809
A combination of a Hartmann-Shack sensor and a standard far-field measurement on one single detector is proposed. The technique is fast and operates without movable parts, thus permitting a 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 of beam width, beam divergence, and beam propagation ratio M2 of partially coherent laser beams. First results indicate that a fairly thorough beam characterization, including spatial coherence, propagation characteristics, and beam quality, can be achieved with this method.