Transponder Aggregator-based optical loopback in a MD-ROADM
First Claim
1. A multi-degree colorless, directionless, contention-less, reconfigurable optical add/drop multiplexer, comprising:
- a reconfigurable optical add/drop multiplexer section for performing connect operations for wavelength division multiplexing signals among all degrees;
a transponder aggregator section having a split-and-select switch-based transponder aggregator, the aggregator having a (N+1)×
(L+1) split-and-select switch for a drop side of the aggregator and another (N+1)×
(L+1) split-and-select switch for an add side of the aggregator, wherein N is a number of the degrees, and L is a number of transponders connected to the aggregator; and
an optical loopback for external links to the multi-degree reconfigurable optical add/drop multiplexer,wherein the (N+1)×
(L+1) split-and-select switch for the drop side comprises an optical switch having an output connected to an input of another optical switch comprised in the other (N+1)×
(L+1) split-and-select switch for the add side, and wherein at least the optical switch and the other optical switch are used to provide an optical far end path loopback there through for a particular one of the degrees.
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Accused Products
Abstract
The present principles are directed to a transponder aggregator-based optical loopback in a multi-degree colorless, directionless, contention-less, reconfigurable optical add/drop multiplexer. The multiplexer includes a reconfigurable optical add/drop multiplexer section for performing connect operations for wavelength division multiplexing signals among all degrees. The section has a plurality of subsections. Each of the subsections corresponds to a respective one of the degrees and has an optical separator at an input side and an optical combiner at an output side. The multiplexer further includes a transponder aggregator section having a split-and-select switch-based transponder aggregator. The multiplexer also includes an optical line loopback having a connection path between the optical separator at the input side and the optical combiner at the output side of at least one of the subsections.
16 Citations
11 Claims
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1. A multi-degree colorless, directionless, contention-less, reconfigurable optical add/drop multiplexer, comprising:
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a reconfigurable optical add/drop multiplexer section for performing connect operations for wavelength division multiplexing signals among all degrees; a transponder aggregator section having a split-and-select switch-based transponder aggregator, the aggregator having a (N+1)×
(L+1) split-and-select switch for a drop side of the aggregator and another (N+1)×
(L+1) split-and-select switch for an add side of the aggregator, wherein N is a number of the degrees, and L is a number of transponders connected to the aggregator; andan optical loopback for external links to the multi-degree reconfigurable optical add/drop multiplexer, wherein the (N+1)×
(L+1) split-and-select switch for the drop side comprises an optical switch having an output connected to an input of another optical switch comprised in the other (N+1)×
(L+1) split-and-select switch for the add side, and wherein at least the optical switch and the other optical switch are used to provide an optical far end path loopback there through for a particular one of the degrees. - View Dependent Claims (2)
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3. A multi-degree colorless, directionless, contention-less, reconfigurable optical add/drop multiplexer, comprising:
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a reconfigurable optical add/drop multiplexer section for performing connect operations for wavelength division multiplexing signals among all degrees; a transponder aggregator section having a split-and-select switch-based transponder aggregator, the aggregator having a (N+1)×
(L+1) split-and-select switch for a drop side of the aggregator and another (N+1)×
(L+1) split-and-select switch for an add side of the aggregator, wherein N is a number of the degrees, and L is a number of transponders connected to the aggregator; andan optical loopback for external links to the multi-degree reconfigurable optical add/drop multiplexer, wherein the (N+1)×
(L+1) split-and-select switch for the drop side comprises an optical splitter having an input connected to an output of an optical combiner comprised in the other (N+1)×
(L+1) split-and-select switch for the add side, and wherein at least the optical splitter and the optical combiner are used to provide an optical local loopback there through for a particular one of the degrees. - View Dependent Claims (4)
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5. A multi-degree colorless, directionless, contention-less, reconfigurable optical add/drop multiplexer, comprising:
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a reconfigurable optical add/drop multiplexer section for performing connect operations for wavelength division multiplexing signals among all degrees; a transponder aggregator section having a split-and-select switch-based transponder aggregator, the aggregator having a (N+1)×
(L+1) split-and-select switch for a drop side of the aggregator and another (N+1)×
(L+1) split-and-select switch for an add side of the aggregator, wherein N is a number of the degrees, and L is a number of transponders connected to the aggregator; andan optical loopback for external links to the multi-degree reconfigurable optical add/drop multiplexer, wherein the N×
L split-and-select switch for the drop side and the add side comprise a respective array of (L+1) optical switches, each of the (L+1) optical switches, except a given one on the drop side and given one on the add side, connected to a respective one of the transponders,wherein the N×
L split-and-select switch for the drop side comprises an array of (N+1) optical splitters, each of the (N+1) optical splitters, except a particular one, connected to a respective one of the degrees,wherein the N×
L split-and-select switch for the add side comprises an array of (N+1) optical combiners, each of the (N+1) optical combiners, except a specific one, corresponding to a respective one of the degrees, andwherein an input of the particular one of the (N+1) optical splitters on the drop side is connected to an output of the specific one of the (N+1) optical combiners on the add side. - View Dependent Claims (6, 7, 8, 9)
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10. A multi-degree colorless, directionless, contention-less, reconfigurable optical add/drop multiplexer, comprising:
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a reconfigurable optical add/drop multiplexer section for performing connect operations for wavelength division multiplexing signals among all degrees; a transponder aggregator section having a split-and-select switch-based transponder aggregator, the aggregator having a (N+1)×
(L+1) split-and-select switch for a drop side of the aggregator and another (N+1)×
(L+1) split-and-select switch for an add side of the aggregator, wherein N is a number of the degrees, and L is a number of transponders connected to the aggregator; andan optical loopback for external links to the multi-degree reconfigurable optical add/drop multiplexer, wherein the N×
L split-and-select switch for the drop side and the add side comprise a respective array of (L+1) optical switches, each of the (L+1) optical switches, except a given one on the drop side and given one on the add side, connected to a respective one of the transponders,wherein the N×
L split-and-select switch for the drop side comprises an array of (N+1) optical splitters, each of the (N+1) optical splitters, except a particular one, connected to a respective one of the degrees,wherein the N×
L split-and-select switch for the add side comprises an array of (N+1) optical combiners, each of the (N+1) optical combiners, except a specific one, corresponding to a respective one of the degrees, andwherein an output of the given one of (L+1) optical switches on the drop side is connected to an input of the given one of (L+1) optical switches on the add side. - View Dependent Claims (11)
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Specification