20 November 1996 Characterization of hard-edge diffracted beams
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Proceedings Volume 2870, Third International Workshop on Laser Beam and Optics Characterization; (1996) https://doi.org/10.1117/12.259889
Event: Third International Workshop on Laser Beam and Optics Characterization, 1996, Quebec City, Canada
Abstract
A liquid nitrogen cooled high precision CCD camera is used for a systematic investigation of the propagation properties of hard edge diffracted beams. The diffraction effects are generated by propagating a nearly Gaussian beam (K equals 0.98, lambda equals 632.8 nm) through circular apertures of different sizes. The apertures are chosen so that 1.5%, 5.9% and 14.1% of the total beam power are truncated. Propagation measurements are performed for two different beam caustics which are connected by a transformation with a nearly aberration-free focusing element. As a consistency test, based on the measured data of the first beam caustic the propagation properties of the second beam caustic are calculated, the results are then compared with the measured data of the second beam caustic. Furthermore the influence of the size of the integration area, taken into account in the calculation of beam parameters, on the results and their self-consistency are investigated in detail.
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Ruediger Maestle, Ruediger Maestle, Adolf Giesen, Adolf Giesen, } "Characterization of hard-edge diffracted beams", Proc. SPIE 2870, Third International Workshop on Laser Beam and Optics Characterization, (20 November 1996); doi: 10.1117/12.259889; https://doi.org/10.1117/12.259889
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