...物理介质依赖子层:其中3个是职业在850纳米,1310纳米和1550纳米的串行物理介质依赖子层,1个是职业在1310纳米的宽带波分复用(WWDM),而1550纳米接口的职业间隔将到达40公里.
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先进的数字移动通信技术、sdh光通信系统技术、密集波分复用技术得到广泛采用，宽带综合业务数字网、at m宽带交换系统等高新技术正在网上试验。
Advanced technologies like digital mobile communications, SDH, dense WDM, etc. have found wide application and high and new technologies like B-ISDN and ATM are on trial over the network.
宽带增益平坦光放大器是密集波分复用光通信系统提高信息容量的基本需求。
Gain flattened wideband optical amplifiers are the basic devices which will meet a demand for the increase of the capacity of dense wavelength division multiplexing optical communication systems.
随着网络服务的多元化，宽带需求量的不断提高，波分复用无源光网络(WDM - PON)是解决接入网技术速率瓶颈的最佳选择。
Owing to the multiple services of network and the rising demand on bandwidth, WDM-PON becomes the best choice to solve the speed limit in access network.
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