自从光纤被引入通信网以来，它已为通信网的发展作出了重要的贡献。随着通信网传输容量的不断增加，光纤通信也发展到了一个新的高度。但是，在目前的光纤通信系统中，网络的各个节点要经过多次的光－电、电－光变换，而其中的电子器件在适应高速、大容量的需求上存在诸多缺点? Since optical fiber was introduced into the communications network, it has made an important contribution to the development of the communications network. With the continuous increase of communication network transmission capacity, optical fiber communication has also developed to a new height. However, in the current optical fiber communication system, each node of the network undergoes many optical-electrical, electrical-optical conversion, and the electronic devices therein have many shortcomings in adapting to the demand of high speed and large capacity.