Reconfigurable optical logic unit with a terahertz optical asymmetric demultiplexer and electro-optic switches

Zhang Yi Shen; Lin Li Wu

doi:10.1364/AO.47.003737

Applied Optics
Vol. 47,
Issue 21,
pp. 3737-3742
(2008)
•https://doi.org/10.1364/AO.47.003737

Reconfigurable optical logic unit with a terahertz optical asymmetric demultiplexer and electro-optic switches

Zhang Yi Shen and Lin Li Wu

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Zhang Yi Shen and Lin Li Wu, "Reconfigurable optical logic unit with a terahertz optical asymmetric demultiplexer and electro-optic switches," Appl. Opt. 47, 3737-3742 (2008)

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Table of Contents Category
- Optical Computing
Optics & Photonics Topics
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The topics in this list come from the Optics and Photonics Topics applied to this article.

About this Article
History
- Original Manuscript: February 25, 2008
- Revised Manuscript: May 26, 2008
- Manuscript Accepted: May 30, 2008
- Published: July 11, 2008

Abstract

A reconfigurable optical logic unit that can execute any binary logic and arithmetic operation on the same hardware with different configurations is proposed. The design, based on cascaded terahertz optical asymmetric demultiplexer switches, introduces reconfigurability with the help of electro-optic switches. The model is simple and practicable.

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Control Signal		Output
A	B	$T 0$	$T 1$	$T 2$	$T 3$
0	0	1	0	0	0
0	1	0	1	0	0
1	0	0	0	1	0
1	1	0	0	0	1

Logic Operation	Sum of Minterms	Configuration
F	None	$\begin{matrix} 0 & 0 & 0 & 0 \end{matrix}$
$A B$	$T 3$	$\begin{matrix} 0 & 0 & 0 & 1 \end{matrix}$
$A \bar{B}$	$T 2$	$\begin{matrix} 0 & 0 & 1 & 0 \end{matrix}$
A	$T 2 + T 3$	$\begin{matrix} 0 & 0 & 1 & 1 \end{matrix}$
$\bar{A} B$	$T 1$	$\begin{matrix} 0 & 1 & 0 & 0 \end{matrix}$
B	$T 1 + T 3$	$\begin{matrix} 0 & 1 & 0 & 1 \end{matrix}$
xor	$T 1 + T 2$	$\begin{matrix} 0 & 1 & 1 & 0 \end{matrix}$
$A + B$	$T 1 + T 2 + T 3$	$\begin{matrix} 0 & 1 & 1 & 1 \end{matrix}$
$\bar{A} \bar{B}$	$T 0$	$\begin{matrix} 1 & 0 & 0 & 0 \end{matrix}$
nxor	$T 0 + T 3$	$\begin{matrix} 1 & 0 & 0 & 1 \end{matrix}$
$\bar{B}$	$T 0 + T 2$	$\begin{matrix} 1 & 0 & 1 & 0 \end{matrix}$
$A + \bar{B}$	$T 0 + T 2 + T 3$	$\begin{matrix} 1 & 0 & 1 & 1 \end{matrix}$
$\bar{A}$	$T 0 + T 1$	$\begin{matrix} 1 & 1 & 0 & 0 \end{matrix}$
$\bar{A} + B$	$T 0 + T 1 + T 3$	$\begin{matrix} 1 & 1 & 0 & 1 \end{matrix}$
$\bar{A} + \bar{B}$	$T 0 + T 1 + T 2$	$\begin{matrix} 1 & 1 & 1 & 0 \end{matrix}$
T	$T 0 + T 1 + T 2 + T 3$	$\begin{matrix} 1 & 1 & 1 & 1 \end{matrix}$

Control Signal		Output
A	B	$T 0$	$T 1$	$T 2$	$T 3$
0	0	1	0	0	0
0	1	0	1	0	0
1	0	0	0	1	0
1	1	0	0	0	1

Logic Operation	Sum of Minterms	Configuration
F	None	$\begin{matrix} 0 & 0 & 0 & 0 \end{matrix}$
$A B$	$T 3$	$\begin{matrix} 0 & 0 & 0 & 1 \end{matrix}$
$A \bar{B}$	$T 2$	$\begin{matrix} 0 & 0 & 1 & 0 \end{matrix}$
A	$T 2 + T 3$	$\begin{matrix} 0 & 0 & 1 & 1 \end{matrix}$
$\bar{A} B$	$T 1$	$\begin{matrix} 0 & 1 & 0 & 0 \end{matrix}$
B	$T 1 + T 3$	$\begin{matrix} 0 & 1 & 0 & 1 \end{matrix}$
xor	$T 1 + T 2$	$\begin{matrix} 0 & 1 & 1 & 0 \end{matrix}$
$A + B$	$T 1 + T 2 + T 3$	$\begin{matrix} 0 & 1 & 1 & 1 \end{matrix}$
$\bar{A} \bar{B}$	$T 0$	$\begin{matrix} 1 & 0 & 0 & 0 \end{matrix}$
nxor	$T 0 + T 3$	$\begin{matrix} 1 & 0 & 0 & 1 \end{matrix}$
$\bar{B}$	$T 0 + T 2$	$\begin{matrix} 1 & 0 & 1 & 0 \end{matrix}$
$A + \bar{B}$	$T 0 + T 2 + T 3$	$\begin{matrix} 1 & 0 & 1 & 1 \end{matrix}$
$\bar{A}$	$T 0 + T 1$	$\begin{matrix} 1 & 1 & 0 & 0 \end{matrix}$
$\bar{A} + B$	$T 0 + T 1 + T 3$	$\begin{matrix} 1 & 1 & 0 & 1 \end{matrix}$
$\bar{A} + \bar{B}$	$T 0 + T 1 + T 2$	$\begin{matrix} 1 & 1 & 1 & 0 \end{matrix}$
T	$T 0 + T 1 + T 2 + T 3$	$\begin{matrix} 1 & 1 & 1 & 1 \end{matrix}$

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Applied Optics