Patent ID: 6246514
Filing Date: 2001-06-12
Classification: H01S,H04B

Abstract:
Optical system comprising an optical amplifier, which includes at least one input and at least one output, and a control circuit for controlling the output power of the amplifier with the aid of a feed-forward process demand signal, said control circuit comprising:a feed-forward block;a first means for tapping light from the input of the amplifier to the feed-forward block, wherein the feed-forward measures the total optical input power;controller means,a detector block anda second means for tapping light from the output of the amplifier to the detector block, wherein a process value signal is sent from the detector block to the controller means and wherein a set point signal is sent to the controller means where it is compared to the process value signal, a feedback process demand signal is sent from the controller means to a combination means, the feed-forward process demand signal is arranged to be sent to a combination means, and wherein the combination means emits an output signal which controls the amplifier.