High-fidelity phase and amplitude control of phase-only computer generated holograms using conjugate gradient minimisation

David Bowman, Tiffany L. Harte, Valentin Chardonnet, Caroline De Groot, Samuel J. Denny, Guillaume Le Goc, Matthew Anderson, Philip Ireland, Donatella Cassettari, Graham David Bruce

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)
6 Downloads (Pure)

Abstract

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 LG01 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.
Original languageEnglish
Pages (from-to)11692-11700
Number of pages9
JournalOptics Express
Volume25
Issue number10
Early online date10 May 2017
DOIs
Publication statusPublished - 15 May 2017

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