대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)

대한전기학회 (The Korean Institute of Electrical Engineers)
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랜덤 위상 마스크를 이용한 광 메모리에서의 암호화 특성

Characteristics of encryption in optical memory using random phase mask

  • 최진산 (서울대학교 전기공학부 국가 지정 홀로그래피 기술 연구실) ;
  • 양병춘 (서울대학교 전기공학부 국가 지정 홀로그래피 기술 연구실) ;
  • 이병호 (서울대학교 전기공학부 국가 지정 홀로그래피 기술 연구실)
  • Choi, Jin-San (NRL of Holotech, School of Electrical Engineering, Seoul National University) ;
  • Yang, Byung-Choon (NRL of Holotech, School of Electrical Engineering, Seoul National University) ;
  • Lee, Byoung-Ho (NRL of Holotech, School of Electrical Engineering, Seoul National University)
  • 발행 : 1999.11.20
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초록

Optical encoding method of images using random-phase encoding in both input and Fourier Planes was proposed by Javidi and his group, and the method was realized experimentally by Singh and his group with use of a photorefractive crystal and a phase conjugate wave.[1-2] Recently various techniques have been proposed theorically and experimentally. These include the method using one random-phase mask in the Fourier plane or two random-phase masks in the input and the Fresnel planes.[3] We demonstrate the difference and the problem of the methods using one or two random-phase masks in the Fourier or Fresnel plane. We perform the encoding and decoding in $LiNbO_3$ crystal using degenerate four-wave mixing.

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