摘要
宽带指的是大容量、高速率(一般双向的速率超过256 kb it/s),因特网或网络的连接是通过比普通铜电话线的带宽高得多的同轴电缆或光缆实现的。宽带信道可以同时传输语音、图像和数据。现在有许多不同的技术适用于宽带通信,如铜线可用于数字用户线(DSL)技术,光纤技术可用于光纤到户(FTTH),有线电视网络和无线技术可用于W iF i和W i-M ax。光纤技术可以为采用FTTH网络(即光纤到最后一英里)的用户提供宽带业务。在城域网和接入网中使用理想光纤(ITUTG.652D)的特点是,理想光纤可以提供宽带业务。究其原因是低水峰ITUTG.652D在1 383±3 nm具有低衰减和小偏振模色散(PMD),从而满足和超过宽带网络对理想光纤的性能要求。
Broadband refers to high capacity high speed （typically greater than 256 kbit/s in both direction）, Internet or network conneetions carried on coaxial or fiber optics cables with wider bandwidth than conventional copper telephone lines . Broadband channel can carry voice, video and data simultaneously. Broadband is available in number of different technologies. E.g. Copper using DSL technology , optical fiber technology using FTTH, cable TV network and wireless technology using WiFI and Wi-Max.
The optical fiber technology for providing broadband services using FTTH networks i. e fiber to the last mile. Properties of ideal fiber used in metro and access networks to provide broadband services, and low water peak ITU T G. 652D, due to its low attenuation at 1383±3 nm and low polarization mode dispersion （PMD） , meets and exceeds the requirement of ideal fiber in broadband network.
出处
《光通信研究》
北大核心
2005年第6期44-47,共4页
Study on Optical Communications
关键词
经济
宽带
通信
理想光纤
cost effective
broadband
communication
ideal fiber
