High-fidelity phase and amplitude control of phase-only computer generated holograms using conjugate gradient minimisation
MetadataShow full item record
We demonstrate simultaneous control of both the phase and amplitude of light using a conjugate gradient minimisation-based hologram calculation technique and a single phase-only spatial light modulator (SLM). A cost function which incorporates the inner product of the light field with a chosen target field within a defined measure region is efficiently minimised to create high fidelity patterns in the Fourier plane of the SLM. A fidelity of F = 0.999997 is achieved for a pattern resembling an LG0/1 mode with a calculated light-usage efficiency of 41.5%. Possible applications of our method in optical trapping and ultracold atoms are presented and we show uncorrected experimental realisation of our patterns with F = 0.97 and 7.8% light efficiency.
Bowman , D , Harte , T L , Chardonnet , V , De Groot , C , Denny , S J , Le Goc , G , Anderson , M , Ireland , P , Cassettari , D & Bruce , G D 2017 , ' High-fidelity phase and amplitude control of phase-only computer generated holograms using conjugate gradient minimisation ' Optics Express , vol 25 , no. 10 , pp. 11692-11700 . DOI: 10.1364/OE.25.011692
Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
DescriptionFunding: Leverhulme Trust (RPG-2013-074); EPSRC (EP/G03673X/1; EP/L015110/1).
Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.