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Published on: March 20, 2017
Multiple-hologram recording with one-beam encoding.
Chung-Sheng Chiang1, Min-Tzung Shiu, Wen-Ho Wu
1School of Defense Science, National Defense University, Tashi, Taoyuan 33509, Taiwan.
Optics Express
|March 29, 2012
Summary
This study introduces a novel holographic recording method using a single object beam and a lenticular lens array to capture multiple images in a photorefractive crystal. This technique simplifies hologram recording without needing a reference wave, successfully creating four holograms in one exposure.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Holographic data storage offers high density but often requires complex setups.
- Conventional holographic recording typically necessitates both a reference and an object beam.
Purpose of the Study:
- To develop a simplified method for recording multiple holograms using only a single object beam.
- To demonstrate a single-exposure, multiple-holographic-recording technique in a photorefractive crystal.
Main Methods:
- Modulating a single object beam with a lenticular lens array to generate multiple sub-beams.
- Angularly separating the sub-beams on the recording plane.
- Overlapping scattered waves within an iron-doped lithium niobate (LiNbO₃:Fe) crystal.
Main Results:
- Successfully recorded four distinct holograms within a single LiNbO₃:Fe crystal (30 x 1 mm³).
- Demonstrated the feasibility of a single-exposure, multiple-holographic-recording process.
- Validated the method's simplicity and effectiveness.
Conclusions:
- The proposed method offers a significant simplification for recording multiple holograms.
- This technique eliminates the need for a separate reference wave, reducing system complexity.
- Photorefractive crystals like LiNbO₃:Fe are suitable media for this advanced holographic recording approach.
