Abstract
There are two applications of devices with variable optical characteristics along the cross section, the so-called soft or apodized apertures (AAs), in laser physics: 1) as outside cavity elements for beam shaping and avoiding hard-edge Fresnel diffraction ripples;1,2 2) as inside cavity elements (in most cases for unstable resonators) for generation diffraction-limited beams without side lobes, with divergence always lower and output energy sometimes higher than that obtained from traditional hard-edge resonators.3,4
© 1991 Optical Society of America
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