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Optical Engineering

Simple ultrafast all-optical AND logic gate
Author(s): Chuanfen Feng; Jian Wu; Kun Xu; Jintong Lin
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Paper Abstract

A simple scheme for an all-optical AND logic gate is proposed based on a sagnac interferometric structure. The operations of this scheme with a 40-Gbit/s return-to-zero (RZ) pseudorandom bit stream (PRBS) are simulated correctly with an output extinction ratio (ER) of about 14.7 dB. Through numerical analyses and discussions, it can be seen that the output ER of the AND operation is improved more than 6 dB, and the output pattern effect is decreased by about 0.4, compared to terahertz optical asymmetric demultiplexer schemes under the same condition. Furthermore, the carrier recovery time of a semiconductor optical amplifier (SOA) is no longer a crucial parameter to restrict the operation speed of this scheme. This scheme is potentially capable of AND operation rates to 100 Gbit/s.

Paper Details

Date Published: 1 December 2007
PDF: 5 pages
Opt. Eng. 46(12) 125006 doi: 10.1117/1.2817651
Published in: Optical Engineering Volume 46, Issue 12
Show Author Affiliations
Chuanfen Feng, Beijing Univ. of Posts and Telecommunications (China)
Jian Wu, Beijing Univ. of Posts and Telecommunications (China)
Kun Xu, Beijing Univ. of Posts and Telecommunications (China)
Jintong Lin, Beijing Univ. of Posts and Telecommunications (China)


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