CHANNEL PRE-COMBINING IN COLORLESS, DIRECTIONLESS, AND CONTENTIONLESS OPTICAL ARCHITECTURES
First Claim
1. An optical add/drop system supporting a colorless, directionless, and contentionless (CDC) architecture, the optical add/drop system comprising:
- a Contentionless Wavelength Selective Switch (CWSS)-based optical add/drop device including N local add/drop ports and M degree ports, wherein the CWSS-based optical add/drop device includes an M-array of 1×
N Wavelength Selective Switches (WSSs) and an N-array of M×
1 switches; and
a first channel pre-combiner including a common port connected to a first port of the N local add/drop ports and at least two local add/drop ports of the first channel pre-combiner coupled to the common port, wherein the first channel pre-combiner further includes amplifiers on the common port in both an add direction and a drop direction,wherein the CWSS-based optical add/drop device is configured to filter out-of-band noise in the add direction from the amplifiers on the common port in the add direction utilizing a corresponding port of the M-array of 1×
N WSSs as an integrated, built-in filter in the CWSS-based optical add/drop where there are no intermediate devices between the amplifier on the common port in the add direction and the CWSS-based optical add/drop for filtering.
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Accused Products
Abstract
An optical add/drop system supporting a colorless, directionless, and contentionless (CDC) architecture includes a Contentionless Wavelength Selective Switch (CWSS)-based optical add/drop device including N local add/drop ports and M degree ports; and a channel pre-combiner including a common port connected to a first port of the N local add/drop ports and at least two local add/drop ports coupled to the common port. The CWSS-based optical add/drop device can include an M-array of 1×N Wavelength Selective Switches (WSSs) and an N-array of M×1 switches. The channel pre-combiner can be a passive device which passively combines the at least two local add ports and splits the at least two local drop ports. The channel pre-combiner can also include amplifiers on the common port in both an add direction and a drop direction.
8 Citations
20 Claims
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1. An optical add/drop system supporting a colorless, directionless, and contentionless (CDC) architecture, the optical add/drop system comprising:
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a Contentionless Wavelength Selective Switch (CWSS)-based optical add/drop device including N local add/drop ports and M degree ports, wherein the CWSS-based optical add/drop device includes an M-array of 1×
N Wavelength Selective Switches (WSSs) and an N-array of M×
1 switches; anda first channel pre-combiner including a common port connected to a first port of the N local add/drop ports and at least two local add/drop ports of the first channel pre-combiner coupled to the common port, wherein the first channel pre-combiner further includes amplifiers on the common port in both an add direction and a drop direction, wherein the CWSS-based optical add/drop device is configured to filter out-of-band noise in the add direction from the amplifiers on the common port in the add direction utilizing a corresponding port of the M-array of 1×
N WSSs as an integrated, built-in filter in the CWSS-based optical add/drop where there are no intermediate devices between the amplifier on the common port in the add direction and the CWSS-based optical add/drop for filtering. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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2. (canceled)
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3. (canceled)
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4. (canceled)
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5. (canceled)
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12. A Reconfigurable Optical Add/Drop Multiplexer (ROADM) node supporting a colorless, directionless, and contentionless (CDC) architecture, the ROADM node comprising:
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one or more Contentionless Wavelength Selective Switch (CWSS)-based optical add/drop devices each including N local add/drop ports and M degree ports, wherein the CWSS-based optical add/drop device includes an M-array of 1×
N Wavelength Selective Switches (WSSs) and an N-array of M×
1 switches; anda plurality of channel pre-combiners each comprising a common port connected to an associated port of the N local add/drop ports and at least two local add/drop ports of each of the plurality of channel pre-combiners coupled to the common port, wherein one or more of the plurality of channel pre-combiners include amplifiers on the common port in both an add direction and a drop direction, wherein a corresponding CWSS-based optical add/drop device is configured to filter out-of-band noise in the add direction from the amplifiers on the common port in the add direction utilizing a corresponding port of the M-array of 1×
N WSSs as an integrated, built-in filter in the CWSS-based optical add/drop where there are no intermediate devices between the amplifier on the common port in the add direction and the CWSS-based optical add/drop for filtering. - View Dependent Claims (16, 17, 18, 19)
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13. (canceled)
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14. (canceled)
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15. (canceled)
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20. A method for an optical add/drop system supporting a colorless, directionless, and contentionless (CDC) architecture, the method comprising:
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providing a Contentionless Wavelength Selective Switch (CWSS)-based optical add/drop device including N local add/drop ports and M degree ports, wherein the CWSS-based optical add/drop device includes an M-array of 1×
N Wavelength Selective Switches (WSSs) and an N-array of M×
1 switches; andproviding a first channel pre-combiner including a common port connected to a first port of the N local add/drop ports and at least two local add/drop ports of the first channel pre-combiner coupled to the common port, wherein the first channel pre-combiner further includes amplifiers on the common port in both an add direction and a drop direction, wherein the CWSS-based optical add/drop device is configured to filter out-of-band noise in the add direction from the amplifiers on the common port in the add direction utilizing a corresponding port of the M-array of 1×
N WSSs as an integrated, built-in filter in the CWSS-based optical add/drop where there are no intermediate devices between the amplifier on the common port in the add direction and the CWSS-based optical add/drop for filtering.
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Specification