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Optical links on silicon photonic chips using ultralow-power consumption photonic-crystal lasers
Optics Express ( IF 3.8 ) Pub Date : 2021-07-29 , DOI: 10.1364/oe.427843
Koji Takeda , Takuma Tsurugaya , Takuro Fujii , Akihiko Shinya , Yoshiho Maeda , Tai Tsuchizawa , Hidetaka Nishi , Masaya Notomi , Takaaki Kakitsuka , Shinji Matsuo

Ultrashort-distance optical interconnects are becoming increasingly important due to continuous improvements in servers and high-performance computers. As light sources in such interconnects, directly modulated semiconductor lasers with an ultrasmall active region are promising. In addition, using Si waveguides is important to provide low loss optical links with functions such as wavelength filtering and switching. In this paper, we demonstrate a wafer-scale heterogeneous integration of lambda-scale embedded active-region photonic-crystal (LEAP) lasers and Si waveguides, achieved through precise alignment. We numerically and experimentally demonstrated the coupling design between the LEAP lasers and Si waveguides; it is important to match propagation constants of Si waveguides and wavenumber of the optical cavity modes. The LEAP lasers exhibit an ultralow threshold current of 13.2-μA and 10-Gbit/s direct modulation. We also achieved the first data transmission using an optical link consisting of a LEAP laser, Si waveguide, and photodetector and obtained an averaged eye diagram at a bit rate of 10 Gbit/s with a bias current of 150 μA.

中文翻译:

使用超低功耗光子晶体激光器的硅光子芯片上的光链路

由于服务器和高性能计算机的不断改进,超短距离光互连变得越来越重要。作为这种互连中的光源,具有超小有源区的直接调制半导体激光器很有前景。此外,使用硅波导对于提供具有波长过滤和切换等功能的低损耗光链路很重要。在本文中,我们展示了通过精确对准实现的 λ 级嵌入式有源区光子晶体 (LEAP) 激光器和 Si 波导的晶圆级异构集成。我们通过数值和实验证明了 LEAP 激光器和 Si 波导之间的耦合设计;匹配硅波导的传播常数和光腔模式的波数很重要。LEAP 激光器具有 13.2μA 的超低阈值电流和 10Gbit/s 的直接调制。我们还使用由 LEAP 激光器、Si 波导和光电探测器组成的光链路实现了第一次数据传输,并以 10 Gbit/s 的比特率和 150 μA 的偏置电流获得了平均眼图。
更新日期:2021-08-02
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