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High-fidelity phase and amplitude control of phase-only computer generated holograms using conjugate gradient minimisation
- Source :
- Optics express. 25(10)
- Publication Year :
- 2017
-
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 LG10 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.
Details
- ISSN :
- 10944087
- Volume :
- 25
- Issue :
- 10
- Database :
- OpenAIRE
- Journal :
- Optics express
- Accession number :
- edsair.pmid..........61da4da18ee3877924d20485f0b75652