Optical processor based on a-SiC technology for spectral data error control

M. A. Vieira, Maria Manuela de Almeida Carvalho Vieira, Vitor Silva, Paula Louro

Research output: Contribution to journalArticlepeer-review


In this paper, we exploit the nonlinear property of the SiC multilayer devices under wavelength backgrounds to design an optical processor for error detection and correction, that enable reliable delivery of spectral data of four-wave mixing over unreliable communication channels. The SiC optical processor for error detection and correction is realized by using double pin/pin a-SiC:H photodetector with front and back biased optical gating elements. Data shows that the background act as selector that pick one or more states by splitting portions of the input multi optical signals across the front and back photodiodes. Boolean operations such as exclusive OR (EXOR) and three bit addition are demonstrated optically with a combination of such switching devices, showing that when one or all of the inputs are present the output will be amplified, the system will behave as an XOR gate representing the SUM. When two or three inputs are on, the system acts as AND gate indicating the present of the CARRY bit. Additional parity logic operations are performed by use of the four incoming pulsed communication channels that are transmitted and checked for errors together. As a simple example of this approach, we describe an all optical processor for error detection and correction and then, provide an experimental demonstration of this fault tolerant reversible system, in emerging nanotechnology.

Original languageEnglish
Pages (from-to)6-10
Number of pages5
JournalMicroelectronic Engineering
Publication statusPublished - 1 Oct 2015


  • Boolean operations
  • Coder/decoder device
  • Integrated optical filter
  • Optical processor


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