1550nm光纤放大器在广电网络中的应用与维护

为了解决有线电视信号的超长距离光纤传输,1 550 nm掺铒光纤放大器是1 550 nm光纤通信系统中重要的光中继传输设备,主要用于电视图像信号、数字电视信号、电话语音信号和数据(或压缩数据)的传输,实现一省一网、以地市州为中心的网络传输体系,1 550 nm光纤放大器的光路结构在功能上包括光放大单元、隔离单元以及监控单元,其中光放大单元采用980 nm或1 480 nm泵浦激光器,用1 550 nm光探测器进行输入输出光的监控,在光放大单元的前后加入光隔离单元以抑制振荡提高性能。

The Application and Maintenance of the 1 550 nm Optical Fiber Amplifier in the Radio and Television Networks

In order to solve the problem about companies cable television network broadcasting over long dis- tances. This essay focus on 1550nm erbium doped fiber amplifiers in optical fiber communication systems, which is an important equipment in 1550nm optical relay transmission, achieving a web in a province and set- ting up network transmission system taking cites and states as center, throughout the city and county （city） and township （town）, and forming the pattern of ＂A network up and down, through urban and rural area＂. The contracture of 1550nm optical fiber amplifier including optical amplification, isolation unit and monitoring unit, Which uses optical amplification unit 980 or 1480nm pump lasers, and uses 1550nm optical input detec- tors to monitoring light output, inserting optical isolation der to suppress oscillations and improve its performance. units before and after optical amplification unit in or-