基于交叉相位调制效应的硅基全光Fredkin门  

Silicon-Based All-Optical Fredkin Gate Using Cross-Phase Modulation Effect

作　　者：虞若兰 李军[1] 陈伟伟[1] 汪鹏君 Yu Ruolan;Li Jun;Chen Weiwei;Wang Pengjun(Faculty of Electrical Engineering and Computer Science,Ningbo University,Ningbo,Zhejiang 315211,China;College of Mathematical,Physics and Electronic Information Engineering,Wenzhou University,Wenzhou,Zhejiang 325035,China)

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211 [2]温州大学电气与电子学院,浙江温州325035

出　　处：《光学学报》2021年第9期135-143,共9页Acta Optica Sinica

基　　金：国家自然科学基金(61875098,61874078);中国浙江省自然科学基金(LY20F050003);宁波市自然科学基金(2018A610133)。

摘　　要：虽然传统的Fredkin门可以很好地实现相应的逻辑功能,但是其消光比和串扰还有待进一步改善。鉴于此,本文提出并设计一种基于交叉相位调制效应的硅基全光Fredkin门,该全光可逆逻辑门由两个2×2的定向耦合器、一个2×1的定向耦合器、一个1×2的定向耦合器以及两个相移臂构成。利用泵浦光与信号光在相移臂中引发的交叉相位调制效应,可以改变上、下相移臂中信号光的相位差,从而在所设计器件的不同端口处输出不同幅度的光波,继而实现Fredkin门的逻辑功能。与此同时,利用MATLAB并融入分步傅里叶法对所设计的硅基全光Fredkin门进行仿真分析。仿真结果表明,器件的最差消光比可达48.46 dB。Although the traditional Fredkin gate can achieve the corresponding logic function,its extinction ratio and crosstalk need further improvement.In view of this,a silicon-based all-optical Fredkin gate based on the cross-phase modulation effect is proposed and designed.The all-optical reversible logic gate consists of two 2×2 directional couplers,a 2×1 directional coupler,and a 1×2 directional coupler and two-phase shift arms.By using the cross-phase modulation effect caused by the pump light and the signal light in the phase shifter arm,the phase difference of the signal light in the upper and lower phase shift arms can be changed,outputting light waves of different amplitudes at different ports of the designed device.Then,it realizes the logic function of the Fredkin gate.Besides,MATLAB and integrating the split-step Fourier method are used to simulate and analyze the designed silicon-based all-optical Fredkin gate.The simulation results show that the worst extinction ratio of the device can reach 48.46 dB.

关 键 词：集成光学 可逆逻辑 硅基光波导 交叉相位调制 Fredkin门 

分 类 号：TN491[电子电信—微电子学与固体电子学]