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

被引：0
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作者：
DECHAO BAN [1 ]
JIA CHEN [1 ,2 ]
YA JIN [1 ]
RENHENG ZHANG [1 ,2 ]
KEQI CAO [1 ,2 ]
JIAN WANG [1 ,2 ]
BEI CHEN [1 ]
YU LIU [1 ]
JINHUA BAI [1 ]
MENGBO FU [3 ]
MING LI [1 ]
NINGHUA ZHU [1 ,4 ]
机构：
[1] Key Laboratory of Optoelectronic Materials and Devices, Institute of Semiconductors, Chinese Academy of Sciences
[2] Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences
[3] Communication and Integrated Photonics Laboratory, Xiongan Institute of Innovation, Chinese Academy of Sciences
[4] Institute of Intelligent Photonics, Nankai
来源：
Photonics Research | 2024年 / 12卷 / 12期
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中图分类号：
TN248 [激光器];
学科分类号：
摘要：
<正>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 and70 Gbps PAM4 signals are also demonstrated. ? 2024 Chinese Laser Press
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页码：2855 / 2862
页数：8
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