In chapter 1, the latest developments in the broadband access technology and APON system are described.The research aim, significance and the main research content of this paper are put forward.

• 第1章对国内外宽带接入技术及APON系统的发展动态进行了分析，明确了课题研究的目的和意义，介绍了研究的主要内容。