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Diffractive optical elements for transformation of modes in lasers

United States Patent

September 1, 2015
View the Complete Patent at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
Spatial mode conversion modules are described, with the capability of efficiently transforming a given optical beam profile, at one plane in space into another well-defined optical beam profile at a different plane in space, whose detailed spatial features and symmetry properties can, in general, differ significantly. The modules are comprised of passive, high-efficiency, low-loss diffractive optical elements, combined with Fourier transform optics. Design rules are described that employ phase retrieval techniques and associated algorithms to determine the necessary profiles of the diffractive optical components. System augmentations are described that utilize real-time adaptive optical techniques for enhanced performance as well as power scaling.
Sridharan; Arun K. (Fremont, CA), Pax; Paul H. (Livermore, CA), Heebner; John E. (Livermore, CA), Drachenberg; Derrek R. (Livermore, CA), Armstrong; James P. (Livermore, CA), Dawson; Jay W. (Livermore, CA)
Lawrence Livermore National Security, LLC (Livermore, CA)
13/ 791,563
March 8, 2013
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT The United States Government has rights in this invention pursuant to Contract No. DE-AC52-07NA27344 between the U.S. Department of Energy and Lawrence Livermore National Security, LLC, for the operation of Lawrence Livermore National Laboratory.