Journal of the Korean Institute of Telematics and Electronics A (전자공학회논문지A)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Implementation of multi-level phase gratings for the optical interconnection using liquid crystal television

LCTV를 이용한 광연결용 다위상 격자의 구현

  • Lee, Yeon-Seon (Dept. of Computer & Comm. Eng., Chungbuk Nat'l Univ.) ;
  • Kim, Nam (Dept. of Computer & Comm. Eng., Chungbuk Nat'l Univ.) ;
  • Park, Seong-Gyoon (Dept. of Information & Comm. Eng., Kongju Nat'l Univ.) ;
  • Ihm, Jong-Tae (Research Center, Korea Mobile Telecom.)
  • 이연선 (충북대학교 정보통신공학과) ;
  • 김남 (충북대학교 정보통신공학과) ;
  • 박성균 (공주대학교 정보통신공학과) ;
  • 임종태 (한국이동통신 중앙연구원)
  • Published : 1996.03.01
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Abstract

Diffraction gratings were designed to generate multiple beams for the real-time optical interconnection in free-space using a liquid crsytal television. Multi-level phase gratings consisted of stepped phase value, 0 to 2$\pi$, and generate a 5$\times$5 spot array, and V-shaped spot patterns which have a maximum diffraction efficiency of 78.84%. Simulated annealing technique was used to determine phase states of each pixel having uniform intensity and high diffraction efficiency. Through the optical interconnection experiments, we compared the diffraction characteristics of beam paterns obtained by binary-level, four-level, and eight-level phase gratings.

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