公开(公告)号：EP0828357A2

公开(公告)日：1998-03-11

申请号：EP97306238.3

申请日：1997-08-15

申请人： NORTHERN TELECOM LIMITED

发明人： Roberts, Kim Byron

IPC分类号： H04B10/155

CPC分类号： H04B10/506 ,  H04B10/2942 ,  H04B10/564

摘要： A control system for an optical element such as an optical amplifier in an optical transmission system comprises means 6 for determining the transmitted optical signal power in each of a plurality of different optical wavelength bands, means 7 for determining which of the powers is closest to a threshold, and means 8 for controlling an output power of the element, or for controlling a parameter which affects the threshold, on the basis of the power closest to the threshold.
Since there is no longer any need to allow a margin for possible gain variations between different wavelengths, power output can be controlled with reduced upper or lower margins, and thus error rates reduced, or transmission distances increased.

摘要翻译： 用于光传输系统中诸如光放大器之类的光学元件的控制系统包括用于确定在多个不同光波长带中的每一个中传输的光信号功率的装置6，用于确定哪个功率最接近于 阈值，以及用于控制元件的输出功率或用于控制影响阈值的参数的装置8，其基于最接近阈值的功率。 由于不再需要允许不同波长之间可能的增益变化的余量，所以可以通过减小上限或下限来控制功率输出，从而降低误码率或增加传输距离。