Optical communications – Transmitter and receiver system – Including compensation
Reexamination Certificate
2005-09-29
2010-06-01
Curs, Nathan M (Department: 2613)
Optical communications
Transmitter and receiver system
Including compensation
C398S037000, C398S177000, C398S209000
Reexamination Certificate
active
07729620
ABSTRACT:
Methods and systems for controlling optical power attenuation are provided. A method comprises periodically measuring an optical power of an optical signal received by an optical receiver and periodically measuring a first attenuation control signal voltage. When the optical power measurement is outside a target power range, the method continues with calculating a target voltage necessary to maintain the optical power measurements at a target power level; calculating a second attenuation control signal based on the target voltage, wherein the second attenuation control signal is calculated to provide an over-damped transient response that maintains the second attenuation control signal within a usable range of a variable optical power attenuator; applying a second attenuation control signal voltage based on the second attenuation control signal to the variable optical power attenuator; and adjusting attenuation of the optical signal based on the second attenuation control signal voltage.
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Mitchell William J.
Santos Ana
Schatz Paul
Stuart Steve
Zavadsky Dean
ADC Telecommunications Inc.
Curs Nathan M
Fogg & Powers LLC
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