supported by the National Natural Science Foundation of China (No.60707006);the Natural Science Research Project of Jiangsu University (No.09KJB510009);the Scientific Research Foundation for Introducing Talent of Nanjing University of Posts & Telecom- munications (No.NY207142)
We propose a novel scheme to generate the ultra-wideband (UWB) doublet signal pulse based on the cross-gain modulation (XGM) in a semiconductor optical amplifier (SOA). In the scheme, only an optical source and an SOA...