WDM passive optical network with parallel signal detection for video and data delivery
View Patent ↗An optical network component, architecture and method for a wavelength division multiplexed passive optical network includes a band coupler configured to demultiplex first and second wavelength division multiplexed content transmitted from an optical line terminal into a first band signal and a second band signal. An arrayed wavelength grating is configured to receive the first band signal and to further demultiplex the first band signal into different wavelengths to provide a plurality of wavelength signals. An optical splitter is configured to split the second band signal into sub-signals and multiplex the sub-signals with each of the wavelength signals such that the first and second wavelength division multiplexed content is provided on a single wavelength to a user.
1. A wavelength division multiplexed passive optical network architecture, comprising:
an optical line terminal configured to transmit first and second wavelength division multiplexed content over an optical link and receive signals from the optical link;
a remote node coupled to the optical link, the remote node comprising:
a band coupler configured to demultiplex first and second wavelength division multiplexed content transmitted from the optical line terminal into a first band signal and a second band signal;
an arrayed wavelength grating configured to receive the first band signal and to further demultiplex the first band signal into different wavelengths to provide a plurality of wavelength signals; and
an optical splitter configured to split the second band signal into sub-signals and multiplex the sub-signals with each of the wavelength signals such that the first and second wavelength division multiplexed content is provided on a single wavelength; and
a plurality of optical network units, each configured to receive both the first and second wavelength division multiplexed content on the single wavelength where different wavelengths are sent to each of the optical network units.
2. The architecture as recited in claim 1 , wherein the at least one optical network unit includes a single photodiode configured to process the single wavelength.
3. The architecture as recited in claim 2 , wherein an output of the photodiode is filtered to separate the first wavelength division multiplexed content from the second wavelength division multiplexed content using parallel signal detection.
4. The architecture as recited in claim 1 , wherein the first and second wavelength division multiplexed content includes at least one video signal and at least one data signal modulated together using subcarrier modulation.
5. The architecture as recited in claim 4 , wherein the data signals include a bit rate of at least 2.5 Gbit/second.
6. The architecture as recited in claim 4 , wherein the video signals include a bit rate of at least 622 Mbit/second.