ROUTE AND COLLECT RECONFIGURABLE OPTICAL ADD/DROP MULTIPLEXER
First Claim
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1. A reconfigurable optical add/drop multiplexer (ROADM), comprising:
- a route stage enabled to receive an input degree and enabled to output a first output degree and a second output degree, wherein the route stage includes a wavelength selective element to route wavelengths in the input degree to at least one of the first output degree and the second output degree; and
a collect stage enabled to receive the first output degree from the route stage and a second input degree and enabled to output a third output degree, wherein the collect stage includes an optical coupler that combines the first output degree and the second input degree to generate the third output degree.
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Abstract
Methods and systems for implementing a route and collect ROADM include a route stage incorporating a 1×2 wavelength selective element to split pass through wavelengths and dropped wavelengths from and input WDM signal. Additional optical functionality of the route and collect ROADM may be implemented using passive optical elements, such as a collect stage comprising an optical coupler to combine add wavelengths with the pass through wavelengths.
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Citations
22 Claims
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1. A reconfigurable optical add/drop multiplexer (ROADM), comprising:
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a route stage enabled to receive an input degree and enabled to output a first output degree and a second output degree, wherein the route stage includes a wavelength selective element to route wavelengths in the input degree to at least one of the first output degree and the second output degree; and a collect stage enabled to receive the first output degree from the route stage and a second input degree and enabled to output a third output degree, wherein the collect stage includes an optical coupler that combines the first output degree and the second input degree to generate the third output degree. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An optical network comprising:
a reconfigurable optical add/drop multiplexer (ROADM), further comprising; a route stage enabled to receive an input degree and enabled to output a first output degree and a second output degree, wherein the route stage includes a wavelength selective element to route wavelengths in the input degree to at least one of the first output degree and the second output degree; and a collect stage enabled to receive the first output degree from the route stage and a second input degree and enabled to output a third output degree, wherein the collect stage includes an optical coupler that combines the first output degree and the second input degree to generate the third output degree. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
Specification