Bi-directional optical access network
First Claim
1. A bi-directional optical access network comprising:
- a central office that generates a plurality of wavelength-locked downstream optical signals, multiplexes the downstream optical signals, and outputs the resultant multiplexed signal; and
a remote node that demultiplexes the multiplexed signal of the downstream optical signals output from the central office, outputs the demultiplexed downstream optical signals to a plurality of subscriber units, respectively, multiplexes upstream optical signals, and outputs the resultant multiplexed signal of the upstream optical signals to the central office, wherein the plurality of subscriber units slices an associated one of the downstream optical signals to detect a portion of the associated downstream optical signal, the plurality of subscribers generate an associated one of the upstream optical signals, which is wavelength-locked by the remaining portion of the associated downstream optical signal, and output the associated upstream optical signal to the remote node.
1 Assignment
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Accused Products
Abstract
A bi-directional optical access network is disclosed. The network includes a central office that generates a plurality of wavelength-locked downstream optical signals, multiplexes the downstream optical signals, and outputs the resultant multiplexed signal. The network also includes a remote node that demultiplexes the multiplexed signal of the downstream optical signals output from the central office, outputs the demultiplexed downstream optical signals to subscriber units, respectively, multiplexes upstream optical signals, and outputs the resultant multiplexed signal of the upstream optical signals to the central office. The subscriber units slice an associated one of the downstream optical signals to detect a portion of the associated downstream optical signal. The subscriber units generate an associated one of the upstream optical signals, which is wavelength-locked by the remaining portion of the associated downstream optical signal, and output the associated upstream optical signal to the remote node.
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Citations
27 Claims
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1. A bi-directional optical access network comprising:
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a central office that generates a plurality of wavelength-locked downstream optical signals, multiplexes the downstream optical signals, and outputs the resultant multiplexed signal; and
a remote node that demultiplexes the multiplexed signal of the downstream optical signals output from the central office, outputs the demultiplexed downstream optical signals to a plurality of subscriber units, respectively, multiplexes upstream optical signals, and outputs the resultant multiplexed signal of the upstream optical signals to the central office, wherein the plurality of subscriber units slices an associated one of the downstream optical signals to detect a portion of the associated downstream optical signal, the plurality of subscribers generate an associated one of the upstream optical signals, which is wavelength-locked by the remaining portion of the associated downstream optical signal, and output the associated upstream optical signal to the remote node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A bi-directional optical access network comprising:
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a central office configured to generate a plurality of wavelength-locked downstream optical signals, to multiplex the downstream optical signals, and to output the resultant multiplexed signal;
a remote node configured to demultiplex the multiplexed signal of the downstream optical signals output from the central office, to output the demultiplexed downstream optical signals to subscriber units, respectively, to multiplex upstream optical signals, and to output the resultant multiplexed signal of the upstream optical signals to the central office, wherein the subscriber units are configured to detect an associated one of the downstream optical signals, to generate an associated one of the upstream optical signals, which is wavelength-locked by the associated downstream optical signal, and to output the associated upstream optical signal to the remote node; and
a first optical fiber that is used to link the central office and the remote node to transmit the multiplexed signal of the downstream optical signals to the remote node, and to transmit the multiplexed signal of the upstream optical signals to the central office. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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27. A method for a bi-directional optical access network, the method comprising the steps of:
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receiving a downstream multiplexed signal of a plurality of wavelength-locked downstream optical signals;
demultiplexing the multiplexed signal;
outputting the demultiplexed downstream optical signals to a plurality of subscriber units, respectively;
slicing an associated one of the downstream optical signals and detecting a portion of the associated downstream optical signal;
generating an associated one of the upstream optical signals, which is wavelength-locked by the remaining portion of the associated downstream optical signal;
outputting the associated upstream optical signal;
multiplexing upstream optical signals; and
outputting the resultant upstream multiplexed signal.
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Specification