Patent ID: 7805077
Filing Date: 2010-09-28
Classification: H04J

Abstract:
1. A method for increasing data transmission capacity over an optical network, comprising: receiving, at a first node on a first optical fiber, a first multiplexed CWDM optical signal in which a CWDM channel is reserved over a range of wavelength frequencies within a CWDM system, the first optical fiber being operable to carry the first multiplexed CWDM optical signal; and inserting a multiplexed DWDM signal into the reserved CWDM channel at the first node on the first optical fiber without demultiplexing the first multiplexed CWDM optical signal, wherein the multiplexed DWDM signal is inserted into the reserved CWDM channel via a first passband filter on the first optical fiber, the method further comprising the act of removing the multiplexed DWDM signal via a second passband filter on the first optical fiber, wherein the CWDM system comprises a legacy optical network, wherein the legacy optical network comprises: