40-Gb/s all-optical digital 4-bit priority encoder employing cross-gain modulation in semiconductor optical amplifiers  

作　　者：LEI Lei DONG JianJi ZHANG Yin YU Yu ZHANG XinLiang 

机构地区：[1]Wuhan National Laboratory for Optoelectronics and the School of Optoelectronic Science and Engineering, Huazhong University of Science andTechnology, Wuhan 430074, China

出　　处：《Chinese Science Bulletin》2012年第10期1204-1208,共5页

基　　金：the National Basic Research Program of China (2011CB301704);the National Natural Science Foundation of China (60877056 and 60901006);the Program for New Century Excellent Talents in University of China (NCET-04-0715)

摘　　要：High-speed all-optical logic circuits have attracted much attention because of their important roles in signal processing in next-generation optical networks.The digital encoder is widely used in binary calculation,multiplexing,demultiplexing,address recognition and data encryption.A priority encoder allows the existence of multiple valid inputs simultaneously,identifies the priority of the request signals and encodes the priority.We propose and experimentally demonstrate an all-optical 4-bit priority encoder for return-to-zero signals at 40 Gbit/s based on cross-gain modulation in semiconductor optical amplifiers.Detuning fil-ters after semiconductor optical amplifiers are employed to improve the output performance.Correct logic bit sequences and clear open eye patterns with extinction ratios exceeding 10 dB are achieved.High-speed all-optical logic circuits have attracted much attention because of their important roles in signal processing in next-generation optical networks. The digital encoder is widely used in binary calculation, multiplexing, demultiplexing, address recognition and data encryption. A priority encoder allows the existence of multiple valid inputs simultaneously, identifies the priority of the request signals and encodes the priority. We propose and experimentally demonstrate an all-optical 4-bit priority encoder for return-to-zero signals at 40 Gbit/s based on cross-gain modulation in semiconductor optical amplifiers. Detuning fil- ters after semiconductor optical amplifiers are employed to improve the output performance. Correct logic bit sequences and clear open eye patterns with extinction ratios exceeding 10 dB are achieved.

关 键 词：半导体光放大器 优先编码器 交叉增益调制 全光 Gb 信号处理 下一代光网络 逻辑电路 

分 类 号：TN762[电子电信—电路与系统] TN722