1引言近年来由PON技术推动了Broadband、IPTV、Triple Play、P2P等IP业务的蓬勃发展,3G业务也逐步兴起,业务爆炸式的增长对核心传送网提出了更高的要求。虽然40Gb/s端口路由器早在2006年就达到了商用水平,但40Gb/s光传输技术,尤其是40Gb/s DWDM技术进展缓慢,一直落后于40Gb/s路由器的开发进度,一度成为制约网络发展的瓶颈。 1 INTRODUCTION In recent years, PON technology has promoted the vigorous development of IP services such as Broadband, IPTV, Triple Play and P2P. The 3G service has also been gradually emerging. The explosive growth of business poses higher requirements for the core transport network. Although the 40Gb / s port router reached the commercial level as early as 2006, the 40Gb / s optical transmission technology, especially the 40Gb / s DWDM technology, has been slow and has lagged behind the development progress of the 40Gb / s router and became a constraint to network development Bottleneck