Demonstration of a directly modulated laser achieving bandwidth exceeding 50 GHz with an integrated active feedback waveguide  

作　　者：DECHAO BAN JIA CHEN YA JIN RENHENG ZHANG KEQI CAO JIAN WANG BEI CHEN YU LIU JINHUA BAI MENGBO FU MING LI NINGHUA ZHU 

机构地区：[1]Key Laboratory of Optoelectronic Materials and Devices,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100083,China [3]Communication and Integrated Photonics Laboratory,Xiongan Institute of Innovation,Chinese Academy of Sciences,Xiongan 071899,China [4]Institute of Intelligent Photonics,Nankai University,Tianjin 300071,China

出　　处：《Photonics Research》2024年第12期2855-2862,共8页光子学研究(英文版)

基　　金：National Key Research and Development Program of China(2023YFB2806400,2023YFB2806100,2023YFB2805700);Strategic Priority Research Program of Chinese Academy of Sciences(XDB43000000).

摘　　要：With the significant expansion of communication capacity in fiber-optic networks,the directly modulated laser serves as a viable candidate due to its low cost and small footprint.In recent years,distributed feedback(DFB)lasers with an integrated passive feedback waveguide were demonstrated to enhance bandwidth by introducing a photon–photon resonance or detuned-loading effect.However,the butt-joint regrowth process between the active layer and passive waveguide complicates the fabrication.Here we propose and demonstrate a DFB laser with an integrated active feedback waveguide,utilizing identical active layer technology to simplify the fabrication process,achieving a bandwidth of exceeding 50 GHz.Additionally,transmission experiments with 55 Gbps NRZ and 70 Gbps PAM4 signals are also demonstrated.

关 键 词：WAVEGUIDE PASSIVE laser 

分 类 号：TN248[电子电信—物理电子学]