Optical communications – Transmitter – Including compensation
Reexamination Certificate
2006-05-12
2010-10-05
Curs, Nathan M (Department: 2613)
Optical communications
Transmitter
Including compensation
C398S194000, C372S038080
Reexamination Certificate
active
07809282
ABSTRACT:
Improved dispersion compensating circuits for optical transmission systems are disclosed. According to the improved method, there is provided a compensation circuit comprising a varactor diode network. The network is preferably inserted between a source of laser modulating signal and the laser. A low pass filter constructs the network. The network preferably includes an inductance and a combined circuit, which includes varactors. The network preferably provides an amplitude dependent delay of the modulating signal applied to the laser. In a first embodiment, a fixed capacitor is in series with a varactor and connected to a DC bias through inductor. In a second embodiment, second varactor is in series with varactor instead with an opposite polarity of a fixed capacitor as used in the first embodiment. In a third embodiment, two varactors301and302are used in place of the fixed capacitor in parallel.
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PCT International Search Report & Written Opinion, RE: Application #PCT/US2009/037909 May 20, 2009.
Cullen Larry T.
Curs Nathan M
General Instrument Corporation
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