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首页> 外文期刊>Journal of Lightwave Technology >Fully-Integrated Heterogeneous DML Transmitters for High-Performance Computing
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Fully-Integrated Heterogeneous DML Transmitters for High-Performance Computing

机译：全集成的异构DML发射器，用于高性能计算

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Optical connectivity, which has been widely deployed in today's datacenters and high-performance computing (HPC) systems, is a disruptive technological revolution to the IT industry in the new Millennium. In our journey to debut an Exascale supercomputer, a completely new computing concept, called memory-driven computing, was innovated recently. This new computing architecture brings challenges and opportunities for novel optical interconnect solutions. Here, we first discuss our strategy to develop appropriate optical link solutions for different data traffic scenarios in memory-driven HPCs. Then, we present detailed review on recent work to demonstrate fully photonics-electronics-integrated single- and multi-wavelength directly modulated laser (DML) transmitters on silicon for the first time. Compact heterogeneous microring lasers and laser arrays were fabricated as photonic engines to work with a customized complementary metal-oxide semiconductor (CMOS) driver circuit. Microring lasers based on conventional quantum well and new quantum dot lasing medium were compared in the experiment. Thermal shunt and MOS capacitor structures were integrated into the lasers for effective thermal management and ultra low-energy tuning. It enables a controllable dense wavelength division multiplexing (DWDM) link architecture in an HPC environment. An equivalent microring laser circuit model was constructed to allow photonics-electronics co-simulation. Equalization functionality in the CMOS driver circuit proved to be critical to achieve up to 14 Gb/s direct modulation with 6 dB extinction ratio. Finally, the on-going and future work is discussed towards more robust, higher speed, and more energy efficient DML transmitters.
机译：光学连接已被广泛部署在当今的数据中心和高性能计算（HPC）系统中，是新千年IT行业的中断技术革命。在我们首次亮相超级计算机的旅程中，最近创新了一个被称为记忆驱动的计算的全新的计算概念。这种新的计算架构为新颖的光学互连解决方案带来了挑战和机遇。在这里，我们首先讨论我们在内存驱动的HPC中为不同数据流量方案开发适当的光链路解决方案的策略。然后，我们对最近的工作提供了详细的综述，以便首次在硅上展示完全光子 - 电子整合的单态和多波长直接调制激光（DML）发射机。紧凑的非均相微管激光器和激光阵列被制造为光子发动机，以与定制的互补金属氧化物半导体（CMOS）驱动电路合作。在实验中比较了基于传统量子阱和新量子点激光介质的微型激光器。热分流器和MOS电容器结构集成到激光器中，以实现有效的热管理和超低能量调谐。它能够在HPC环境中实现可控密集的波分复用（DWDM）链路架构。构造了等效的探测激光电路模型以允许光子 - 电子器件共模。 CMOS驱动电路中的均衡功能证明，以6 dB消光比率最高可达14 GB / s直接调制至关重要。最后，讨论了正在进行的和未来的工作，以更强大，更高的速度和更节能的DML发射器。

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