Patent ID: 7031050

Claim:
A method for cancellation of cross-talk among multiple channels occurring in a traditional Optical amplifier (OA), the method comprising the steps of: detecting tones at an input and an output of a Smart Optical Amplifier (Smart OA), the Smart OA comprising the traditional OA and a Cross-talk Cancellation Unit (XTCU); comparing the detected tones at the input and output of the Smart OA; generating destructive tones with such amplitudes and phases so as to cancel cross-talk; and eradicating cross-talk at the output of the Smart OA by applying the destructive tones in the XTCU, wherein the steps of comparing the detected tones and generating the destructive tones comprise the steps of: processing the electrical signals corresponding to the input and output of the Smart OA in a Processing and Control Unit (PCU) and a gain information signal from the Smart OA for the PCU; and generating cross-talk cancellation tones by the PCU.