Opto-Electronics Review

, Volume 15, Issue 2, pp 78–81

Optoelectronic multiplexer for digital data processing based on lipid crystal pixels and optical fiber elements

  • I. Pérez
  • J. M. S. Pena
  • J. C. Torres
  • R. Manzanares
  • C. Marcos
  • C. Vázquez
Article

DOI: 10.2478/s11772-007-0003-y

Cite this article as:
Pérez, I., Pena, J.M.S., Torres, J.C. et al. Opto-Electron. Rev. (2007) 15: 78. doi:10.2478/s11772-007-0003-y
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Abstract

In this work, we present an optoelectronic digital multiplexer 4:1 based on a multipixel nematic liquid crystal cell. This device uses two optical control signals to select one among four possible optical data inputs. These data signals are generated by four red LEDs, which are guided through plastic optical fiber towards liquid crystal pixels. For our purpose, only four pixels of the cell will be used to modulate the optical signal across them. Each pixel will be addressed by a square waveform coming from the conditioning circuit managed by a microcontroller system. The electronic control allows the multiplexer to work as as simple two input logical gates such as AND, NAND, OR, NOR, XOR and XNOR. The operation time of the device is limited by the response time of LC cell that is in the millisecond range.

Keywords

optoelectronic digital multiplexeroptical logic gateliquid crystaldigital processing

Copyright information

© Association of Polish Electrical Engineers 2007

Authors and Affiliations

  • I. Pérez
    • 1
  • J. M. S. Pena
    • 1
  • J. C. Torres
    • 1
  • R. Manzanares
    • 1
  • C. Marcos
    • 1
  • C. Vázquez
    • 1
  1. 1.Grupo de Displays y Aplicaciones Fotónicas, Dpto. Tecnología ElectrónicaUniversidad Carlos IIILeganés, MadridSpain