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Digital Inline Holographic Microscopy (DIHM) of Weakly-scattering Subjects
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Point spread function of a collinear holographic storage system.

Ching-Cherng Sun1, Ye-Wei Yu, Shu-Ching Hsieh

  • 1Department of Optics and Photonics, National Central University, Chung-Li 320, Taiwan. ccsun@dop.ncu.edu.tw

Optics Express
|June 25, 2009
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Summary

A new paraxial solution for coaxial holographic storage reveals the reference pattern is key to improving system performance. Optimizing this pattern enhances readout quality and reduces errors in holographic data storage.

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Area of Science:

  • Optics and Photonics
  • Data Storage Technologies

Background:

  • Holographic data storage offers high density but faces challenges in optical system design.
  • Understanding optical characteristics like point spread function and shift selectivity is crucial for system performance.

Purpose of the Study:

  • To propose a paraxial solution for coaxial holographic storage algorithms.
  • To analyze optical characteristics and identify key factors for improving system performance.

Main Methods:

  • Utilizing scalar diffraction theory.
  • Employing a volume hologram as an integrator of lights (VOHIL) model.
  • Developing a paraxial solution for collinear holographic storage systems.

Main Results:

  • The reference pattern significantly influences the point spread function.
  • The paraxial solution provides effective insight into optical characteristics.
  • System bit error rate can be improved by modifying the reference pattern.

Conclusions:

  • The reference pattern is critical for high-quality readout in coaxial holographic storage.
  • The proposed solution aids in designing better reference patterns for enhanced holographic storage systems.