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1.背景介绍PON作为用户大带宽接入的首选技术已经越来越多地部署在全球各地的宽带接入网中,它为用户提供了一种部署成本低且灵活性高的大带宽传送手段。作为一种灵活的吉比特光纤
1. Background As the preferred technology for user access to large bandwidth, PON has been deployed more and more in broadband access networks all over the world. It provides users with a large bandwidth transmission method with low deployment cost and high flexibility . As a flexible gigabit fiber