Optical communications – Transmitter – Including compensation
Reexamination Certificate
2006-09-19
2006-09-19
Li, Shi K. (Department: 2613)
Optical communications
Transmitter
Including compensation
C398S197000
Reexamination Certificate
active
07110682
ABSTRACT:
Methods and apparatus for maintaining a pre-determined ratio of a pilot tone power and a total mean optical power of an optical signal are provided. One apparatus includes an optical source coupled to provide an optical signal in response to a DC bias and an AC bias corresponding to a pilot tone signal. A processor is coupled to compute each of an AC component and a DC component of the optical signal from the same digitally sampled signal. A feedback control is coupled to vary at least one of the DC bias and the AC bias in accordance with a difference between a pre-determined value and a ratio of the AC and DC components.
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Brorson Stuart D.
Carrick John C.
Frankfort Eric J.
Holmstrom Roger P.
Talmadge Paul C.
Davis William D.
Davis & Associates
Li Shi K.
Tellabs Operations Inc.
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