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Optical Engineering

Simple novel all-optical half-adder
Author(s): Zhixin Chen
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Paper Abstract

On the basis of Sagnac interferometric structure, a simple novel ultrafast scheme of all-optical half-adder is proposed. The structure comprises two of the same balanced terahertz optical asymmetric demultiplexers (TOADs). One TOAD is utilized to achieve an all-optical XOR gate, which is logic SUM. The other is utilized to obtain an all-optical AND gate, which is logic CARRY. Logical SUM and CARRY are simultaneously realized at 80 Gbit/s. Through numerical analysis, the operating characteristics of the scheme are illustrated at 80 Gbit/s. Furthermore, the carrier recovery time of the semiconductor optical amplifier is no longer a crucial parameter to restrict the operation speed of this scheme.

Paper Details

Date Published: 1 April 2010
PDF: 6 pages
Opt. Eng. 49(4) 043201 doi: 10.1117/1.3366669
Published in: Optical Engineering Volume 49, Issue 4
Show Author Affiliations
Zhixin Chen, Central Univ. of Finance and Economics (China)

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