Patent ID: 6829410
Filing Date: 2004-12-07
Classification: G02B,H04B,Y10S

Abstract:
A bi-directional amplification node for an optical network comprising:a first optical comb filter to pass a first set of frequencies in a first direction and a second set of frequencies in a second direction; a first optical circulator coupled with the first optical comb filter; a first optical amplifier coupled with the first optical circulator to amplify signals in the first set of frequencies received from the first optical circulator; a second optical circulator coupled with the first optical amplifier, the second optical circulator to receive amplified signals from the first optical amplifier and to pass the amplified signals; a second optical comb filter coupled with the second optical circulator, the second optical comb filter to pass the first set of frequencies in a first direction and to pass the second set of frequencies in a second direction; a second optical amplifier coupled between the second optical circulator and the first optical circulator, the second optical amplifier to amplify signals in the second set of frequencies received from the second optical circulator and to pass the amplified signals to the first optical circulator.