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http://dx.doi.org/10.3807/KJOP.2003.14.6.663

Holographic disk memories based on localized hologram recording  

오용석 (부경대학교 전자컴퓨터정보통신공학부)
김복수 (부경대학교 전자컴퓨터정보통신공학부)
장주석 (부경대학교 전자컴퓨터정보통신공학부)
강영수 (부경대학교 화학과)
Publication Information
Korean Journal of Optics and Photonics / v.14, no.6, 2003 , pp. 663-668 More about this Journal
Abstract
We studied a localized hologram recording method that can be used in a disk-shaped medium. In this method, the reference beam is focused by use of a cylindrical lens to get a thin spot in the medium, and then a hologram is recorded in that spot by illuminating the signal beam. Many localized holograms are multiplexed by shifting the medium by a distance more than the thin spot size of the reference beam. This method does not need recording-time scheduling for uniform diffraction efficiencies. We show that a minimal required thickness of the recording medium exists for a given spot size of the signal beam. We performed experiments for data storage and retrieval, and obtained a storage density of 20 bits/${\mu}{\textrm}{m}$$^2$ and a raw-bit error rate (RBER) of 2.5${\times}$10$^{-3}$ , when a 2 mm-thick Fe-doped LiNbO$_3$ crystal was used.
Keywords
holographic disk memory; localized hologram; recording medium thickness;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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