Wavelength Division Multiplexing Passive Optical Network for Providing Both of Broadcasting Service and Communication Service and Central Office Used Thereof
First Claim
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1. A central office used in a wavelength division multiplexing passive optical network, which provides a broadcasting service and a communication service simultaneously, the central office comprising:
- a plurality of downstream optical transmitters for outputting optical signals for providing a plurality of subscribers with a data service;
a plurality of upstream optical receivers for receiving optical signals of upstream data from the subscribers and converting the optical signals into electrical signals;
a wavelength division multiplexer/demultiplexer for multiplexing/demultiplexing the optical signals;
a broadband light source for broadcasting signals, the broadband light source outputting optical signals for providing the subscribers with a broadcasting service; and
a modulator for optically modulating the broadband light source into broadcasting signals.
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Abstract
Disclosed is a wavelength division multiplexing passive optical network for simultaneously providing a broadcasting service and a data service by employing a broadband light source, which uses mutually injected Fabry-Perot laser diodes, as well as a central office used for the same.
89 Citations
14 Claims
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1. A central office used in a wavelength division multiplexing passive optical network, which provides a broadcasting service and a communication service simultaneously, the central office comprising:
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a plurality of downstream optical transmitters for outputting optical signals for providing a plurality of subscribers with a data service; a plurality of upstream optical receivers for receiving optical signals of upstream data from the subscribers and converting the optical signals into electrical signals; a wavelength division multiplexer/demultiplexer for multiplexing/demultiplexing the optical signals; a broadband light source for broadcasting signals, the broadband light source outputting optical signals for providing the subscribers with a broadcasting service; and a modulator for optically modulating the broadband light source into broadcasting signals. - View Dependent Claims (6, 9, 10, 12, 13, 14)
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2. A central office used in a wavelength division multiplexing passive optical network, which provides a broadcasting service and a communication service simultaneously, the central office comprising:
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a plurality of first downstream optical transmitters for outputting optical signals for providing a plurality of subscribers with a broadcasting service; a plurality of second downstream optical transmitters for outputting optical signals for providing a plurality of subscribers with a data service; a plurality of upstream optical receivers for receiving optical signals of upstream data from the subscribers and converting the optical signals into electrical signals; a wavelength division multiplexer/demultiplexer for multiplexing/demultiplexing the optical signals; a broadband light source for broadcasting signals, the broadband light source being spectrum-sliced by the wavelength division multiplexer/demultiplexer and injected into light sources for broadcasting signals; a broadband light source for downstream signals, the broadband light source being spectrum-sliced by the wavelength division multiplexer/demultiplexer and injected into light sources for downstream signals; and a broadband light source for upstream signals, the broadband light source being spectrum-sliced by the wavelength division multiplexer/demultiplexer and injected into light sources for upstream signals. - View Dependent Claims (11)
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3. A central office used in a wavelength division multiplexing passive optical network, which provides a broadcasting service and a communication service simultaneously, the central office comprising:
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a plurality of downstream optical transmitters for outputting optical signals for providing a plurality of subscribers with a broadcasting service and a data service; a plurality of upstream optical receivers for receiving optical signals of upstream data from the subscribers and converting the optical signals into electrical signals; a wavelength division multiplexer/demultiplexer for multiplexing/demultiplexing the optical signals; a broadband light source for broadcasting signals and downstream signals, the broadband light source being spectrum sliced by the wavelength division multiplexer/demultiplexer and injected into light sources for downstream signals; and a broadband light source for upstream signals, the broadband light source being spectrum-sliced by the wavelength division multiplexer/demultiplexer and injected into light sources for upstream signals. - View Dependent Claims (7)
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4. A central office used in a wavelength division multiplexing passive optical network, which provides a broadcasting service and a communication service simultaneously, the central office comprising:
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a plurality of downstream optical transmitters for outputting optical signals for providing a plurality of subscribers with a data service; a plurality of upstream optical receivers for receiving optical signals of upstream data from the subscribers and converting the optical signals into electrical signals; a wavelength division multiplexer/demultiplexer for multiplexing/demultiplexing the optical signals; a broadband light source for broadcasting signals and downstream signals, the broadband light source being spectrum sliced by the wavelength division multiplexer/demultiplexer and injected into light sources for downstream signals; an external modulator for optically modulating downstream optical signals into broadcasting signals, the downstream optical signals having been multiplexed by the wavelength division multiplexer/demultiplexer; and a broadband light source for upstream signals, the broadband light source being spectrum-sliced by the wavelength division multiplexer/demultiplexer and injected into light sources for upstream signals.
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5. A central office used in a wavelength division multiplexing passive optical network, which provides a broadcasting service and a communication service simultaneously, the central office comprising:
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a plurality of downstream optical transmitters for outputting optical signals for providing a plurality of subscribers with a data service; a plurality of upstream optical receivers for receiving optical signals of upstream data from the subscribers and converting the optical signals into electrical signals; a wavelength division multiplexer/demultiplexer for multiplexing/demultiplexing the optical signals; a broadband light source for downstream signals, the broadband light source being spectrum-sliced by the wavelength division multiplexer/demultiplexer and injected into light sources for downstream signals; a broadband light source for broadcasting signals and upstream signals, the broadband light source being spectrum sliced by the wavelength division multiplexer/demultiplexer and injected into light sources for upstream signals; and a modulator for optically modulating the broadband light source for broadcasting signals and upstream signals into broadcasting signals. - View Dependent Claims (8)
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Specification