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 <i>M</i><sup>2</sup> 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.
© 2002 Optical Society of America
Bernd Schäfer and Klaus Mann, "Determination of Beam Parameters and Coherence Properties of Laser Radiation by Use of an Extended Hartmann-Shack Wave-Front Sensor," Appl. Opt. 41, 2809-2817 (2002)