An AWGR based Low-Latency Optical Switch for Data Centers and High Performance Computing Systems.

详细信息   

• 作者：Yu ; Runxiang.
• 学历：Doctor
• 年：2014
• 毕业院校：University of California
• Department：Electrical and Computer Engineering.
• ISBN：9781321024814
• CBH：3627319
• Country：USA
• 语种：English
• FileSize：7101635
• Pages：160

文摘

The growing demand for cloud-based services and high-performance computing has spurred interest in new datacenter architectures. The network inside the data center is quite different from wide-area and local-area networks that have been the subject of intensive research over the past few decades. Datacenter networks have to be scalable to hundreds of thousands of nodes and capable of handling bursty traffic comprised of small packets. Both network performance in terms of latency and throughput) and power consumption have become critical in datacenters. The poor scalability of high-bandwidth single-stage electrical switches results in a cost-prohibitive and power-hungry solution for interconnecting all the clusters in a data center. Single-stage,high-port-count,and high-data-rate optical switches can potentially help to meet this requirement by replacing the electronic switches at both the core level and cluster level inside a datacenter. In fact,an optical switch can easily support 10 Gb/s and 40 Gb/s traffic,and offer much higher throughput and lower latency under high traffic loads by creating parallel data paths based on optical parallelism. This work presents an advanced,scalable AWGR based optical switch for data centers and high performance computing systems that builds upon several enabling technologies such as the widely tunable semiconductor lasers,the monolithically integrated Mach-Zehnder interferometer wavelength converters,the fast-locking burst-mode CDR circuit and the arrayed waveguide grating routers. With the intelligence delivered by the electrical switch controller and the optical signal processing,scalable and cost effective contention resolution schemes have been developed,which remove the need of electrical loopback buffer and the centralized control plane. The introduction of a novel wavelength conversion technique,which supports multiple modulation formats including QPSK,improves channel spectrum efficiency and system flexibility. In addition,we prove the feasibility of a proposed architecture by demonstrating successful wavelength routing functions on a prototype based on silicon photonic integration technology on a SOI platform. With the ongoing technology advances and development efforts,we believe that the AWGR based optical switches will play an important role in the next generation optical networks.