Reconfigurable optical add-drop multiplexers employing optical multiplex section shared protection
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United States of America Patent
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Feb 26, 2008
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N/A
app pub date -
Feb 24, 2004
filing date -
Feb 24, 2004
priority date (Note) -
Expired
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Abstract
A reconfigurable optical add-drop multiplexer is disclosed that enables Optical Multiplex Section (OMS) shared protection rings. The ROADM comprises a first optical supervisory module, coupled to a first amplifier module, which in turn is coupled to a first broadcast and select module, where the first broadcast and select module is coupled to both a first multiplexer/demultiplexer module and the first optical supervisory module. Each optical supervisory module has an optical tap for tapping a fraction of an outgoing OMS signal that is fed back or looped back to a 2.times.1 optical switch in the optical supervisory module.
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