Power-efficient calibration and reconfiguration for optical network-on-chip
Power-efficient calibration and reconfiguration for optical network-on-chip
复制标题
片上光网络的高能效校准和重新配置
DOI：
--
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Shiyuan Yang
中科院分区：
文献类型：
--
作者：
Yan Zheng;Peter Lisherness;Ming Gao;J. Bovington;K. Cheng;Hong Wang;Shiyuan Yang
纳米光子制造的最新进展使片上光网络成为下一代多核/众核系统有吸引力的互连选项，提供高带宽和功率效率。光学元件（环形谐振器）的制造后和运行时校准对于构建稳健的光通信系统至关重要，因为它们对工艺和热变化高度敏感。现有的基于偏置电压和温度调节的调谐方法需要过多的功率来完全补偿这些变化。在这项工作中，我们提出了一组补充技术来应对这一挑战并显着降低调谐功耗：1）子通道重新映射方案，将所需的调谐从自由光谱范围减少到小于一个通道（通常小于1 nm）； 2) 基于收发器的网络拓扑，能够构建和调整更少的环，同时保持相同的系统吞吐量。我们的结果表明，所提出的方法可以将调谐功率降低多达 99.85%。
Recent advances in nanophotonic fabrication have made the optical network-on-chip an attractive interconnect option for next-generation multi-/many-core systems, providing high bandwidth and power efficiency. Both postfabrication and runtime calibration of the optical components (ring resonators) are essential to building a robust optical communication system, as they are highly sensitive to process and thermal variation. Existing tuning methods based on bias voltage and temperature adjustment require excessive power to fully compensate for these variations. In this work, we propose a set of complementary techniques to address this challenge and significantly reduce the tuning power consumption: 1) a subchannel remapping scheme to decrease the required tuning from the free spectral range to less than one channel (typically less than 1 nm); 2) a transceiver-based network topology capable of building and tuning far fewer rings while maintaining the same system throughput. Our results show that the proposed methods can together reduce the tuning power by as much as 99.85%.