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Updated: Jun 16, 2026
08:39
Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
Published on: January 28, 2019
Hologram positioning servo for phase-encoded holographic data storage systems.
Zoltán Göröcs1, Tamás Sarkadi, Gábor Erdei
1Computer and Automation Research Institute (MTA SZTAKI), H-1111 Budapest, Kende ut 13., Hungary. zoli.gorocs@gmail.com
Applied Optics
|February 2, 2010
Summary
We developed a novel hologram technique using phase encryption and multiplexing to encode positional data. This method allows precise electronic alignment of the reference beam, eliminating the need for mechanical positioning devices.
Area of Science:
- Optics and Photonics
- Information Storage
Background:
- Accurate positioning of holographic elements is crucial for data retrieval.
- Traditional methods rely on precise and often bulky mechanical systems.
Purpose of the Study:
- To introduce a method for encoding positional information directly into holograms.
- To enable electronic alignment of the reference beam for hologram readout.
Main Methods:
- Utilizing phase encryption and hologram multiplexing to embed positional data.
- Developing an electronic alignment technique for the phase code within the reference beam.
Main Results:
- Achieved electronic alignment precision of approximately 1/100th of the hologram size (4.4 micrometers).
- Demonstrated the feasibility of the proposed method through experimental validation.
Conclusions:
- The proposed technique offers a viable alternative to mechanical positioning for holographic systems.
- This method enhances precision and simplifies the readout process for holograms.
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