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US 8,913,891 B2Granted
Technique for blocking of optical channels
AssigneeECI Telecom Ltd.
InventorsAmitay Melamed, Shai Stein
Life of this patent
Estimating the term…
Abstract
A method and a Reconfigurable Optical Add Drop Multiplexer (ROADM) where blocking of a first optical signal carried over a specific optical channel in the ROADM is performed by compensating the first optical signal by a second optical signal created for that purpose.
Claims4
A Reconfigurable Optical Add Drop Multiplexer (ROADM) comprising an input line, an output line, a drop unit, an add unit and a through line, the ROADM further comprising:
- a digitizing unit for digitizing a first optical signal carried over a specific optical channel,
- a processing unit for inverting a result of digitizing,
- a de-digitizing unit for creating from the inverted result a second optical signal being capable to suppress the first optical signal,
- a combining unit for combining the first signal and the second signal to obtain a third signal where the first signal and the second signal are mutually suppressed, and
- a feedback connection between the output line and one or both of the drop unit and the add unit, for adjusting the second optical signal.
2 more elements
Dependencies are inferred from the claim text.