Demonstration of all optical logic gates by single/differential typed vertical cavity laser with depleted optical thyristor

Woon Kyung Choi, Doo Gun Kim, Yon Tae Moon, Do Gyun Kim, Hoseong Kim, Tae Kyung Chung, Young Wan Choi, Kent D. Choquette, Seok Lee, Deok Ha Woo

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Latching optical switches and optical logic gates with AND or OR, plus the INVERT functionality are demonstrated for the first time by the monolithic integration of a single and differential typed vertical cavity lasers with depleted optical thyristor (VCL-DOT) structure with a low threshold current of 0.65 mA, a high on/off contrast ratio of more than 50 dB, a high slope efficiency of 0.38 mW/mA, and high sensitivity to input optical light. By simply changing a reference switching voltage, this single-typed device operates as two logic functions, optical logic AND and OR. The differential-typed VCL-DOTs operate also as all logic gates, AND/NAND, OR/NOR, and INVERT function by simple change of a reference input light power. The thyristor laser fabricated by using the oxidation process shows a high optical output power efficiency and a high sensitivity to the optical input light.

Original languageEnglish (US)
Title of host publicationVertical-Cavity Surface-Emitting Lasers XI
StatePublished - 2007
EventVertical-Cavity Surface-Emitting Lasers XI - San Jose, CA, United States
Duration: Jan 24 2007Jan 25 2007

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherVertical-Cavity Surface-Emitting Lasers XI
Country/TerritoryUnited States
CitySan Jose, CA


  • Complete depletion voltage
  • Depleted optical thyristor
  • Finite difference method
  • Optical communication systems
  • Optical switching

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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