Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1997-09-12
1999-09-21
Negash, Kinfe-Michael
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359136, H04B 1020, H04J 1400
Patent
active
059561653
ABSTRACT:
A system, method and apparatus are described that allow for the updating and transmittal of a low data rate signal providing ancillary network data as a rider on a high data rate optical signal. This subcarrier modulated signal can be processed and updated by using a drop/insert facility without having to alter the high data rate signal component of the data signal. Since the subcarrier signal can be detected by inexpensive equipment without having to detect and demultiplex the high data rate signal, the approach described offers a cost effective solution to the problem of network monitoring. Ancillary network management information can be communicated regardless of the quality or loss of the high data rate signal. In addition, by updating the subcarrier signal rider in a cumulative manner, a complete history of the fiber link the modulated optical signal travels on is provided to network management.
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Fee John A.
McKiel, Jr. Frank A.
MCI Communications Corporation
Negash Kinfe-Michael
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