Computer-Generated Holography Methods for Data Page Reconstruction Using Phase-Only Medium

Achievements in the field of high-speed spatial modulation electrooptic components provide the possibility to create perspective optical-digital diffractive systems for information storage and processing that outperform modern electronic counterparts by utilizing throughput, energy efficiency, and r...

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Bibliographic Details
Published inApplied sciences Vol. 13; no. 7; p. 4479
Main Authors Minikhanov, Timur Z., Zlokazov, Evgenii Y., Cheremkhin, Pavel A., Starikov, Rostislav S., Evtikhiev, Nikolay N.
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.04.2023
Subjects
Algorithms
amplitude modulation
Amplitudes
Coding
Comparative analysis
computer-generated holography
data page
Data points
Diffraction patterns
Energy efficiency
Holograms
holographic data storage
Holography
Information processing
Information storage
Information storage and retrieval
Luminous intensity
Methods
Multilevel
Phase modulation
Quadrature amplitude modulation
Random access memory
Reconstruction
spatial light modulator
Spatial light modulators
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Summary:Achievements in the field of high-speed spatial modulation electrooptic components provide the possibility to create perspective optical-digital diffractive systems for information storage and processing that outperform modern electronic counterparts by utilizing throughput, energy efficiency, and reliability. This work presents a study of computer-generated holography methods that allow the formation of spatially-modulated information signals (data pages) with high accuracy using phase-only spatial light modulators. Computer-generated Fourier hologram fringe patterns were formed using bipolar intensity and double-phase coding. Numerical and experimental results of both methods’ implementation are compared. It was determined that bipolar intensity holograms provide higher data density on the data page if complex digital modulation methods such as multilevel amplitude and phase or quadrature modulation are used to represent data points. Double-phase coding can offer perspective for multilevel amplitude or multilevel intensity modulated data page reconstruction; however, exact control of phase modulation characteristics is required to obtain high reconstruction quality.
ISSN:2076-3417
2076-3417
DOI:10.3390/app13074479