摘要
A monolithic integrated two-section distributed feedback(TS-DFB)semiconductor laser for high-speed direct modulation is proposed and analyzed theoretically.The grating structure of the TS-DFB laser is designed by the reconstructionequivalent-chirp(REC)technique,which can reduce the manufacturing cost and difficulty,and achieve high wavelength controlling accuracy.The detuned loading effect and the photon-photon resonance(PPR)effect are utilized to enhance the modulation bandwidth of the TS-DFB laser,exceeding 37 GHz,while that of the conventional one-section DFB laser is only 16 GHz.When the bit rate of the non-return-to-zero(NRZ)signal reaches 55 Gb/s,a clear eye diagram with large opening can still be obtained.These results show that the proposed method can enhance the modulation bandwidth of DFB laser significantly.
作者
张云山
徐逸帆
郑吉林
李连艳
方涛
陈向飞
Yun-Shan Zhang;Yi-Fan Xu;Ji-Lin Zheng;Lian-Yan Li;Tao Fang;Xiang-Fei Chen(College of Electronic and Optical Engineering&College of Flexible Electronics,Nanjing University of Posts and Telecommunications,Nanjing 210023,China;College of Communications Engineering,PLA Army Engineering University,Nanjing 210007,China;College of Engineering and Applied Sciences,Nanjing University,Nanjing 210023,China)
基金
the National Key Research and Development Program of China(Grant No.2020YFB2205804)
the National Natural Science Foundation of China(Grant Nos.61974165 and Grant 61975075)
the National Natural Science Foundation of China for the Youth,China(Grant No.62004105)。
