利用单个半导体光放大器实现非反转归零码的可重构全光逻辑门

Reconfigurable All-Optical Logic Gates with Not-Inverted Data Technique by Using Single Semiconductor Optical Amplifier

提出了一种新型非反转归零(RZ)码的可重构全光逻辑门方案。该方案基于单个半导体光放大器(SOA)和可调谐光带通滤波器(TOBPF)。利用SOA的四波混频效应和交叉增益调别(XGM)效应,实现了RZ码信号的多种功能逻辑运算。在不改变实验装置的情况下,通过调节带通滤波器中心波长和信号光功率,可以在不同逻辑功能之间进行切换。实验实现了10 Gb/s全光信号问的"与","非","或非","同或","·B","A·"等基本逻辑运算。与用连续光作为探测光不同的是,本方案采用了时钟信号作为探测光,这样各个逻辑门的输出均为非反转RZ码,有利于不同逻辑门的进一步组合。

A reconfigurable all-optical logic gates with not-inverted data technique is demonstrated by using a single semiconductor optical amplifier （SOA） and a tunable optical band-pass filter （TOBPF）. Based on cross-gain modulation （XGM） and four-wave mixing （FWM） in the SOA, multiple Boolean calculation of the return-to-zero signal is realized, and different logical functions are switched by adjusting band-pass filter center wavelength and optical signal power. In the experiment, all-optical multiple logic gates of AND, NOT, NOR, NXOR,A·B, and A·B functions at 10 Gb/s are demonstrated without changing the experimental setup. In order to obtain not-inverted RZ data, the clock signal is used for the probe signal which is benefit to combining the basic logics to complicated logic gates.