All-optical XNOR and AND gates simultaneously realized in a single semiconductor optical amplifier with improved dynamics  

作　　者：李培丽 黄德修 张新亮 朱光喜 

机构地区：[1]Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China [2]Department of Electronics and Information, Huazhong University of Science and Technology, Wuhan 430074, China

出　　处：《Chinese Physics B》2007年第12期3719-3727,共9页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （Grant No 60407001） and the National Science Foundation for Post-doctoral Scientists of China （Grant No 20060390246）.

摘　　要：All-optical XNOR and AND logic gates using four-wave mixing （FWM） and cross-gain modulation （XGM） in a single semiconductor optical amplifier （SOA） with improved dynamics are simultaneously realized. By numerical simulation, the effects of the input optical wave powers and injection current on the critical factors of the logic gate performances, such as the ON-OFF contrast ratio, the power-output level of the logic ＇1＇, and the difference between power outputs of the logic ＇1＇, are investigated in detail. In addition, the effect of the counter-propagating CW pump on the gain recovery is analysed.All-optical XNOR and AND logic gates using four-wave mixing （FWM） and cross-gain modulation （XGM） in a single semiconductor optical amplifier （SOA） with improved dynamics are simultaneously realized. By numerical simulation, the effects of the input optical wave powers and injection current on the critical factors of the logic gate performances, such as the ON-OFF contrast ratio, the power-output level of the logic ＇1＇, and the difference between power outputs of the logic ＇1＇, are investigated in detail. In addition, the effect of the counter-propagating CW pump on the gain recovery is analysed.

关 键 词：All-optical logic gate four-wave mixing cross-gain modulation semiconductor optical amplifier 

分 类 号：O57[理学—粒子物理与原子核物理]