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1.WDMPON应运而生随着人们对通信需求的增长,光纤接入(FTTx)得到了快速发展。以无源光网络(PON:Passive Optical Network)技术为主的光纤接入技术已经以多种形态在全球得到了广泛应用。全球FTTx用户数201 1年底已超过1.2亿,比2010年增长30%;其中,亚洲约占71%,北美约占1 6%,欧洲约占1 3%。201 1年中国已成为FTTx用户数最大的国家,其次是日本和韩国。当前,在我国全业务运营和网络融合的背景下,高带宽应用如视频会议、实时游戏、IPTV等正不断涌现,尤其是HDTV、网真等视频业务,对网络接入带宽提出了更高的要求,也推动着新的FTTx技术层出不穷。此外,“三网融合”的逐
1.WDMPON came into being With the growth of people’s demand for communication, optical access (FTTx) has been rapid development. Optical access technology based on PON (Passive Optical Network) technology has been widely used in many forms all over the world. The number of FTTx subscribers in the world 201 exceeded 120 million by the end of 2011, an increase of 30% over 2010; of these, 71% are in Asia, 16% in North America and 13% in Europe. 201 China has become the country with the largest FTTx subscribers in 2001, followed by Japan and South Korea. At present, under the background of full-service operation and network convergence in our country, high-bandwidth applications such as video conferencing, real-time games and IPTV are emerging constantly. Especially for video services such as HDTV and telepresence, higher bandwidth Requirements, but also promote the new FTTx technology after another. In addition, “triple play ” by