公开(公告)号：US20070264014A1

公开(公告)日：2007-11-15

申请号：US11382974

申请日：2006-05-12

申请人： Ian McClean ,  Stephen Fourte ,  Jonathon Drake ,  Barrie Flintham

发明人： Ian McClean ,  Stephen Fourte ,  Jonathon Drake ,  Barrie Flintham

IPC分类号： H04B10/08

CPC分类号： H04B10/2931 ,  H01S3/06754 ,  H01S3/10007 ,  H01S3/1301

摘要： A variable gain optical amplifier comprises an EDFA for amplifying optical signals at different wavelengths and a pump driver 14 for optically pumping the EDFA to provide optical gain. An input detector 2 is provided for monitoring the power Pin of input signals to the EDFA, and an output detector 3 is provided for monitoring the power Pout of output signals from the EDFA. A gain control arrangement is provided for supplying a drive signal to the pump driver 14 to control the optical gain including a feed forward arrangement 20, 21, 22, 23 for supplying a feed forward signal dependent on the monitored input power Pin, and a feed back arrangement 5, 6, 7, 8, 9, 30 for supplying a feed back signal dependent on the monitored output power Pout. In order to ensure rapid gain control the feed back arrangement comprises an adaptive proportional-integral (PI or PID) controller 30 for controlling the optical gain at a required gain set point in accordance with proportional and integral control coefficients Kp and Ki corresponding to a required gain profile, at least one of which is dynamically variable in dependence on the monitored output power Pout, the output signal from the controller 30 and the feed forward signal being added in an adder 31 to produce the drive signal for the pump driver 14.

摘要翻译： 可变增益光放大器包括用于放大不同波长的光信号的EDFA和用于光泵浦EDFA以提供光增益的泵驱动器14。 提供输入检测器2，用于监视到EDFA的输入信号的中的功率P'，并且提供输出检测器3，用于监视来自于EDFA的输出信号的功率P < EDFA。 提供增益控制装置，用于向泵驱动器14提供驱动信号以控制光学增益，包括前馈装置20,21,22,23，用于提供取决于所监视的输入功率P'的前馈信号 以及反馈装置5,6,7,8,9,30，用于根据所监视的输出功率P OUT提供反馈信号。 为了确保快速增益控制，反馈装置包括一个自适应比例积分（PI或PID）控制器30，用于根据比例和积分控制系数K P来控制所需增益设定点处的光增益。 SUB＆gt;和对应于所需增益分布的K i I i，其中的至少一个根据监视的输出功率P OUT输出可动态地变化，来自控制器的输出信号 30，并且前馈信号被添加在加法器31中，以产生用于泵驱动器14的驱动信号。