Journal
OPTICS EXPRESS
Volume 25, Issue 15, Pages 17382-17392Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.25.017382
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- Natural Sciences and Engineering Research Council of Canada (NSERC) [RGPIN-2014-05736]
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An analytical model for the conversion efficiency from a TEM00 mode to an arbitrary Laguerre-Gaussian (LG) mode with null radial index spiral phase optics is presented. We extend this model to include the effects of stepped spiral phase optics, spiral phase optics of non-integer topological charge, and the reduction in conversion efficiency due to broad laser bandwidth. We find that through optimization, an optimal beam waist ratio of the input and output modes exists and is dependent upon the output azimuthal mode number. (C) 2017 Optical Society of America
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