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Vol. 184, Issue 1, January 2015, pp. 116-122

 

Bullet

 

Error Detection on a Spectral Data Using an Optical Processor Based on a-SiC Technology
 

1, 2 Manuel Augusto Vieira, 1, 2, 3 Manuela Vieira, 1, 2 Paula Louro, 1, 2 Vitor Silva

1 Telecommunication and Computer Dept. ISEL, R. Conselheiro Emídio Navarro, 1959-007 Lisboa, Portugal
2 CTS-UNINOVA, Quinta da Torre, Monte da Caparica, 2829-516, Caparica, Portugal
3 DEE-FCT-UNL, Quinta da Torre, Monte da Caparica, 2829-516, Caparica, Portugal
1 Tel.: +351218317150, fax: +351218317144

E-mail: mv@isel.ipl.pt

 

Received: 14 November 2014 /Accepted: 15 December 2014 /Published: 31 January 2015

Digital Sensors and Sensor Sysstems

 

Abstract: Abstract In this paper, we exploit the nonlinear property of the SiC multilayer devices to design an optical processor for error detection that enables reliable delivery of spectral data of four- wave mixing over unreliable communication channels. The SiC optical processor is realized by using double pi’n/pin a-SiC:H photodetector with front and back biased optical gating elements. Visible pulsed signals are transmitted together at different bit sequences. The combined optical signal is analyzed. Data show 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 EXOR and three bit addition are demonstrated optically, showing that when one or all of the inputs are present, 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 using 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 then provide an experimental demonstration of this idea.

 

Keywords: Optical processor, Integrated optical filter, Boolean operations, Coder/decoder device, Optoelectronics.

 

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