Patent ID: 6775484
Filing Date: 2004-08-10
Classification: H04B

Abstract:
A receiver for receiving optical signals from a communication network, comprising:a signal processing device; an optical coupling device, operatively connected to the communication network, for receiving the optical signals, the optical signals containing noise; an optical filtering device, disposed between the signal processing device and the optical coupling device, for filtering the optical signals received through the optical coupling device, the optical filtering device providing a filtered portion of the optical signals to the signal processing device in a first path, and reflecting a rejected portion of the optical signals to the optical coupling device, wherein a part of the rejected portion of the optical signals is provided through the optical coupling device to the signal processing device in a second path, so as to allow the signal processing device to combine the filtered portion of the optical signals and said part of the rejected portion of the optical signals for providing noise compensated signals in a downstream direction from the filtered portion of the optical signals, a test signal source coupled to the first and second paths for providing a test signal thereto to determine different propagation factors in the first and second paths; and a compensation mechanism, disposed in at least one of the first and second paths for compensating for the different propagation factors.