数据中心光通信技术

doi:10.11959/j.issn.1000-0801.2016154

摘要/Abstract

摘要：

由于互联网业务的快速发展，数据中心的流量已经占据全球通信网络流量绝大部分。作为高速信息传输的主要载体，如今光通信技术已经在数据中心中得到了广泛应用，从距离几米服务器间的光互连到连接世界各地数据中心的光网络。概要介绍了数据中心的光通信技术，包括数据中心之间互连的广域网、城域网技术和数据中心内部服务器及交换机之间光互连技术，并对各个领域内一些不同的技术方案做了简要的讨论和比较。

关键词: 数据中心, 光通信, 广域网, 城域网, 光模块

Abstract:

Due to the fast growth of internet services,datacenter related traffic has become the major part of the global network traffic.As a main technology for high-speed data transmission,optical communication technologies have been widely used in today's datacenter networks,from a few meter server-to-server interconnects to transoceanic datacenter-to-datacenter optical networks.Here the optical communication technologies for datacenters were reviewed,including technologies connecting datacenters in wider-area networks and metro-area networks as well as optical interconnect technologies within datacenters,and the advantages and disadvantages of some technologies in the networks were discussed.

Key words: datacenter, optical communication, wide-area network, metro-area network, optical transceiver

谢崇进. 数据中心光通信技术[J]. 电信科学, 2016, 32(5): 44-51.

Chongjin XIE. Optical communication technologies for datacenters[J]. Telecommunications Science, 2016, 32(5): 44-51.

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类别	电信运营商	数据中心
距离	＜600 km	＜80 km
节点	多达几十个	3～4
网络	环网，mesh，大量使用ROADM	点对点，很少ROADM
业务	语音、移动、数据、企业用户等，业务颗粒种类多	数据中心之间数据传输、Ethernet、颗粒单一
容量	中等	大

技术	激光器	光纤（双向）	波长数	接头	最大传输距离/m
SR4	VCSEL	8根MMF	1	多模MPO	100～300
SWDM4	VCSEL	2根MMF	4	多模LC	100～300
PSM4	DFB激光器	8根SMF	1	单模MPO	500
CWDM4	DFB激光器	2根SMF	4	单模LC	2 000