Broadband optical frequency comb generation based on single electro‑absorption modulation driven by radio frequency coupled signals  

作　　者：Pan Jiang Peili Li Yiming Fan 

机构地区：[1]College of Electronic and Optical Engineering&College of Microelectronics,Nanjing University of Posts and Telecommunications,Nanjing 210023,China

出　　处：《Frontiers of Optoelectronics》2022年第4期43-50,共8页光电子前沿（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.61571237).

摘　　要：Broadband optical frequency comb(OFC)generation based on a single electro-absorption modulator(EAM)is proposed.The EAM is driven by a radio frequency(RF)multi-frequency signal generated by a multiplication coupler composed of an electrical power splitter and an arithmetic circuit.Thus the number of comb-lines of the generated OFC can be increased.A complete theoretical model of OFC generation by an EAM driven by nth power of the RF source is established,and the performance of the OFC is analyzed by using OptiSystem software.The results show that,the number of comb-lines of the OFC is positively correlated with the number of multiplication of the RF source signal.The frequency spacing of the comb-lines is twice the frequency of the RF source signal and is tunable by adjusting the frequency of the RF source signal.Increasing chirp factor and modulation index of EAM could increase the number of comb-lines of the generated OFC.The amplitude of the RF source signal had little impact on the fatness of the OFC and the average OFC power.The scheme developed is not only simple and low-cost,but also can produce a large number of comb-lines.

关 键 词：Optical frequency comb(OFC) Electro-absorption modulator(EAM) Radio frequency(RF)coupled signal 

分 类 号：TN761[电子电信—电路与系统]