Patent ID: 7596317

Claim:
An optical network system comprising: a central office (CO) comprising: an A-band broadband light source (BLS), an A-band BLS coupling device connected to the A-band BLS, a first wavelength-division multiplexer/demultiplexer connected to the A-band BLS coupling device, and a plurality of first optical transceivers connected to the first wavelength-division multiplexer/demultiplexer; a remote node (RN) comprising: a B-band BLS, a B-band BLS coupling device connected to the B-band BLS, and a second wavelength-division multiplexer/demultiplexer connected to the B-band BLS coupling device, wherein the RN is connected to the CO through an optical fiber; and a plurality of optical network terminations (ONTs) comprising a plurality of second optical transceivers connected to the second wavelength-division multiplexer/demultiplexer, wherein the A-band BLS is configured to generate light to be used in a downstream signal from the CO to the RN, and wherein the B-band BLS is configured to generate light to be used in an upstream signal from the RN to the CO.