Patent ID: 7627254
Filing Date: 2009-12-01
Classification: H04B

Abstract:
1. A system for controlling optical link power, the system comprising: a head node that transmits an optical signal, having a plurality of optical channels, on an optical link; a plurality of amplifier nodes, serially coupled to the head node; an end node, coupled to the plurality of amplifier nodes, that receives the optical signal from the optical link; an amplifier gain control loop, coupled across one of the plurality of amplifier nodes, the amplifier gain control loop controlling said one of the plurality of amplifier nodes such that said one of the plurality of amplifier nodes applies a constant gain to each of the plurality of optical channels; and a link gain setting control loop coupled between the head end node and said one of the plurality of amplifier nodes, the link gain setting control loop adjusting a target gain value for said one of the plurality of amplifier nodes.