Ultrahigh-speed graphene-based optical coherent receiver

• DOI: 10.1038/s41467-021-25374-0
• Publication Date: 2021-08-20T10:03:20Z
• Authors: Yilun Wang; Xiang Li; Zhibin Jiang; Lei Tong; Wentao Deng; Xiaoyan Gao; Xinyu Huang; Hailong Zhou; Yu Yu; Lei Ye; Xi Xiao; Xinliang Zhang
• Keywords: Gigabit Ethernet; Gigabit; Baud

Abstract Graphene-based photodetectors have attracted significant attention for high-speed optical communication due to their large bandwidth, compact footprint, and compatibility with silicon-based photonics platform. Large-bandwidth coherent receivers are crucial elements large-capacity networks advanced modulation formats. Here, we propose experimentally demonstrate an integrated receiver based on a 90-degree hybrid graphene-on-plasmonic slot waveguide photodetectors, featuring footprint bandwidth far exceeding 67 GHz. Combined the balanced detection, 90 Gbit/s binary phase-shift keying signal is received promoted signal-to-noise ratio. Moreover, receptions of 200 quadrature 240 16 amplitude signals single-polarization carrier realized low additional power consumption below 14 fJ/bit. This graphene-based will promise potential applications in 400-Gigabit Ethernet 800-Gigabit technology, paving another route future networks.