Journal of the Institute of Electronics Engineers of Korea SD (대한전자공학회논문지SD)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Differential switching operation of vertical cavity laser with depleted optical thyristor for optical logic gates

광 로직 게이트 구현을 위한 차동구조 Vertical Cavity Laser - Depleted Optical Thyristor에 관한 연구

  • Choi, Woon-Kyung (Microwave and Lightwave Telecommunications Lab., Chung-ang University) ;
  • Kim, Doo-Gun (Microwave and Lightwave Telecommunications Lab., Chung-ang University) ;
  • Choi, Young-Wan (Microwave and Lightwave Telecommunications Lab., Chung-ang University)
  • 최운경 (중앙대학교 전자전기공학부) ;
  • 김두근 (중앙대학교 전자전기공학부) ;
  • 최영완 (중앙대학교 전자전기공학부)
  • Published : 2007.07.25
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Abstract

Latching optical switches and optical logic gates with AND or OR, and the INVERT functionality are demonstrated, for the first time, by the monolithic integration of a differential typed vertical cavity laser with depleted optical thyristor (VCL-DOT) structure with a low threshold current of 0.65 mA, a high slope efficiency of 0.38 mW/mA, and high sensitivity to input optical light. Many kinds of logic functions (AND, OR, NAND, NOR, and INVERT) are experimentally demonstrated using a differential switching operation scheme changing the intensity of a reference input beam without any changes of electrical circuits.

본 연구에서는 광 논리 및 광 스위칭 시스템에 응용할 수 있는 수직 구조 레이저 - 완전 공핍 광 싸이리스터 (vertical cavity laser - depleted optical thyristor, VCL-DOT)를 제작하고, 본 연구실에서 제안한 차동 스위칭 방법을 이용하여 광 로직(AND, OR, NAND, NOR, INVERT) 함수를 구현하였고, 그 특성을 측정, 분석하였다. 제작한 VCL-DOT는 0.65 mA의 낮은 레이징 문턱 전류, 0.38 mW/mA의 높은 slope efficiency, 그리고 낮은 입력 광 파워에도 높은 민감도를 보인다. 차동 소자타입의 광 싸이리스터를 이용하면 복잡한 전기 회로를 이용하지 않고도, 집적화된 단일 소자에서 간단한 기준 광입력 시호의 파워를 제어함으로써 다양한 광 로직 게이트를 구현할 수 있다는 장점을 갖는다.

Keywords

References

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