随着Internet业务和多媒体应用的快速发展，网络的业务量正在以指数级的速度迅速膨胀，这就要求网络必须具有高比特率数据传输能力和大吞吐量的交叉能力。这对通信网络的容量来说是一个巨大的挑战。光纤通信技术出现以后，其近30THz的巨大潜在带宽容量给通信领域带来了蓬勃发展 With the rapid development of Internet services and multimedia applications, the network traffic is rapidly expanding exponentially, which requires the network must have a high bit-rate data transmission capacity and high throughput cross-cutting capabilities. This represents a huge challenge to the capacity of the communications network. After the advent of optical fiber communication technology, the huge potential bandwidth capacity of nearly 30THz has brought the booming development in the field of communication