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首页> 外文期刊>Nature Electronics >Synchronous subnanosecond clock and data recovery for optically switched data centres using clock phase caching
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Synchronous subnanosecond clock and data recovery for optically switched data centres using clock phase caching

机译：使用时钟相位缓存的光学切换数据中心的同步亚译时时钟和数据恢复

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摘要

The rapid growth in the amount of data being transferred within data centres, combined with the slowdown in Moore’s Law, creates challenges for the future scalability of electronically switched data-centre networks. Optical switches could offer a future-proof alternative, and photonic integration platforms have been demonstrated with nanosecond-scale optical switching times. End-to-end switching time is, however, currently limited by the clock and data recovery time, which typically takes microseconds, removing the benefits of nanosecond optical switching. Here we show that a clock phase caching technique can provide clock and data recovery times of under 625 ps (16 symbols at 25.6 Gb s~(−1)). Our approach uses the measurement and storage of clock phase values in a synchronized network to simplify clock and data recovery versus conventional asynchronous approaches. We demonstrate the capabilities of our technique using a real-time prototype with commercial transceivers and validate its resilience against temperature variation and clock jitter.
机译：在数据中心内转移的数据量的快速增长与Moore Law的放缓相结合，为电子切换数据中心网络的未来可扩展性带来了挑战。光学开关可以提供未来的替代方案，并通过纳秒级光学切换时间进行了对光子集成平台。然而，端到端切换时间目前受到时钟和数据恢复时间的限制，通常需要微秒，从而消除纳秒光学切换的益处。在这里，我们表明时钟相位缓存技术可以提供625 ps下方的时钟和数据恢复时间（25.6 gb s〜（-1）的16个符号）。我们的方法使用同步网络中时钟相位值的测量和存储来简化时钟和数据恢复与传统异步方法。我们展示了我们的技术的能力，使用具有商业收发器的实时原型，并验证其对温度变化和时钟抖动的恢复力。

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