Patent 7738163 was granted and assigned to Ericsson on June, 2010 by the United States Patent and Trademark Office.
In an optical transmission system for transmission of data along an optical fiber link, a receiver for an optical supervisory channel is capable of detecting data at a lower rate at which a Raman pump is enabled, and at a higher rate which is commenced when the higher power of a Raman amplified signal has been received.