光纤通信已为人们所熟悉。为了提高原有光网络系统的通信容量，改进传输效率，充分利用资源，降低成本，实现在光缆中既可传电话，又可传电视和其他宽带信号，光扩容技术正越来越受到人们的重视。光扩容技术即光复用技术是光纤通信发展的一个重要方向，也是未来实现光纤接入网 Fiber optic communications are familiar to people. In order to improve the communication capacity of the original optical network system, improve the transmission efficiency, make full use of resources and reduce costs, both in the optical cable transmission of telephones, but also transmission of television and other broadband signals, optical expansion technology is more and more people Pay attention. Optical expansion technology that is optical multiplexing technology is an important direction for the development of optical fiber communications, but also the future to achieve optical access network