Optical communications – Diagnostic testing – Determination of communication parameter
Reexamination Certificate
2006-09-05
2006-09-05
Phan, Hanh (Department: 2638)
Optical communications
Diagnostic testing
Determination of communication parameter
C398S025000, C398S026000, C398S027000, C398S038000, C398S079000, C398S202000, C398S206000, C398S208000, C398S209000, C398S214000, C398S091000, C398S094000, C398S173000, C398S177000, C398S155000, C398S162000, C359S341430, C359S337000, C359S578000, C375S224000, C375S355000, C356S519000, C356S517000, C356S153000, C250S227180
Reexamination Certificate
active
07103276
ABSTRACT:
A scanning optical monitoring system and method are appropriate for high speed scanning of a WDM signal band. The system and method are able to identify dropped channels or, more generally, discrepancies between the determined or detected channel inventory and a perpetual inventory for the WDM signal, which perpetual inventory specifies the channels that should be present in the WDM signal assuming proper operation of the network. The system includes a tunable optical filter that scans a pass band across a signal band of a WDM signal to generate a filtered signal. A photodetector then generates an electrical signal in response to this filtered signal. A decision circuit compares the electrical signal to a threshold and a controller, which is responsive to the decision circuit, inventories the channels in the WDM signal.
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Atia Walid A.
Korn Jeffrey A.
Axsun Technologies, Inc.
Houston Eliseeva LLP
Phan Hanh
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