Patent ID: 6937387
Filing Date: 2005-08-30
Classification: H04B

Abstract:
1. An apparatus for automatic recovery from a control loop failure, comprising: a feedback loop coupled to an optical amplifier and operable to produce a gain associated with the optical amplifier; a pump laser included within the feedback loop and coupled to the optical amplifier, the pump laser operable to generate optical energy that is fed to the optical amplifier, the feedback loop operable to provide a current to the pump laser used to generate the optical energy at a selected one or more inputs of the optical amplifier; a reprogramming element coupled to the feedback loop and operable to set the current that is provided to the pump laser; and a recovery controller coupled to the feedback loop and operable to store one or more characteristics associated with the feedback loop that produce the gain, the recovery controller operable to communicate a signal to the reprogramming element that directs the reprogramming element to provide a selected current value of the current to the pump laser in response to a failure in the feedback loop.