All optical logic gates based on an asymmetric nonlinear directional coupler

被引：75
|
作者：
Fraga, W. B.
Menezes, J. W. M.
da Silva, M. G.
Sobrinho, C. S.
Sombra, A. S. B.
机构：
[1] Univ Fed Ceara, Lab Telecommun & Ciencia & Engn Mat LOCEM, Dept Fis, BR-60455760 Fortaleza, Ceara, Brazil
[2] Univ Fed Ceara, Dept Engn Teleinformat DETI, Ctr Tecnol, BR-60455760 Fortaleza, Ceara, Brazil
来源：
OPTICS COMMUNICATIONS | 2006年 / 262卷 / 01期
关键词：
D O I：
10.1016/j.optcom.2005.12.033
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The performance of three different asymmetric dual core nonlinear directional couplers which includes an increasing and a decreasing self-phase modulation profile (SPM) was investigated. The asymmetry is associated to the SPM profile of one of the channels. Looking at the transmission characteristics of the device, through the direct- and cross-channel, we did a study of the extinction ratio (Xratio) of the devices. It was observed that in the operation of the three couplers, the performance of AND, XOR and OR gates are dependent on the nonlinearity profile of the coupler. For all configurations, an AND port with gain was observed. We can conclude that to operate the asymmetric coupler as a logic gate one has to control the nonlinearity profile to optimize the transmission characteristics thorough the extinction rate coefficient (Xratio). (C) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：32 / 37
页数：6
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