OPTICAL SIGNAL DROPPER AND OPTICAL SIGNAL ADDER FOR USE IN A ROADM SYSTEM
First Claim
1. An optical signal dropper comprising:
- a plurality of drop wavelength selection/input units, each having a first output port and a second output port, for outputting received input wavelength-specific optical signals from the output ports; and
a drop output unit for outputting wavelength-specific optical signals output from the first output ports of the drop wavelength selection/input units, to respective different optical paths;
wherein said drop wavelength selection/input units correspond respectively to a plurality of routes for transmitting wavelength-multiplexed optical signals, and each of said drop wavelength selection/input units receives a wavelength-specific optical signal included in the wavelength-multiplexed optical signal transmitted through a corresponding route and wavelength-specific optical signals output from the second output ports of other drop wavelength selection/input units, as the input wavelength-specific optical signals, and outputs each of the wavelength-specific optical signals from either said first output port or said second output port depending on the wavelength of the wavelength-specific optical signal.
1 Assignment
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Accused Products
Abstract
A plurality of output units 31, each having first output ports and second output ports, output received input wavelength-specific optical signals from the output ports. Switchers 32 output the wavelength-specific optical signals output from the first output ports of the output units 31 to respective different optical paths. Output units 31 correspond respectively to a plurality of routes for transmitting wavelength-multiplexed optical signals. Each of output units 31 receives a wavelength-specific optical signal included in the wavelength-multiplexed optical signal transmitted through a corresponding route and wavelength-specific optical signals output from the second output ports of other output units, as the input wavelength-specific optical signals, and output each of the wavelength-specific optical signals from either the first output ports or the second output ports depending on the wavelength of the wavelength-specific optical signal.
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Citations
8 Claims
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1. An optical signal dropper comprising:
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a plurality of drop wavelength selection/input units, each having a first output port and a second output port, for outputting received input wavelength-specific optical signals from the output ports; and a drop output unit for outputting wavelength-specific optical signals output from the first output ports of the drop wavelength selection/input units, to respective different optical paths; wherein said drop wavelength selection/input units correspond respectively to a plurality of routes for transmitting wavelength-multiplexed optical signals, and each of said drop wavelength selection/input units receives a wavelength-specific optical signal included in the wavelength-multiplexed optical signal transmitted through a corresponding route and wavelength-specific optical signals output from the second output ports of other drop wavelength selection/input units, as the input wavelength-specific optical signals, and outputs each of the wavelength-specific optical signals from either said first output port or said second output port depending on the wavelength of the wavelength-specific optical signal. - View Dependent Claims (2, 3, 4)
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5. An optical signal adder comprising:
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a plurality of add wavelength selection/output units which correspond respectively to a plurality of routes for transmitting wavelength-multiplexed optical signals, each of said add wavelength selection/output units having a third output port connected to a corresponding one of the routes and a fourth output port, wherein each of said add wavelength selection/output units outputs received input wavelength-specific optical signals from the output ports; and an add input unit for receiving wavelength-specific optical signals from a plurality of optical paths and outputting the received wavelength-specific optical signals respectively to said add wavelength selection/output units; wherein each of said add wavelength selection/output units receives the wavelength-specific optical signals output from said add input unit and the wavelength-specific optical signals output from the fourth output ports of other add wavelength selection/output units, as the input wavelength-specific optical signals, and output each of the wavelength-specific optical signals from either said third output port or said fourth output port depending on the wavelength of the wavelength-specific optical signal. - View Dependent Claims (6, 7, 8)
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Specification