Optical: systems and elements – Optical modulator – Light wave temporal modulation
Reexamination Certificate
2005-11-01
2005-11-01
Ben, Loha (Department: 2873)
Optical: systems and elements
Optical modulator
Light wave temporal modulation
C359S237000, C359S279000, C385S002000, C385S003000, C385S014000, C398S098000, C398S182000, C398S188000, C356S340000
Reexamination Certificate
active
06961166
ABSTRACT:
An optical digital external modulator having a cascaded arrangement of interferometers is provided. The optical modulator includes an electrode structure for applying an electric field to each interferometer in the cascade and biasing circuitry coupled to the electrode structure for biasing each interferometer at a predetermined bias point. In particular, each predetermined bias point is selected to be above quadrature and for providing improved transmission performance of digital data signals. Preferably, the modulator has a reflective design that helps to increase the modulation bandwidth, lower the drive voltage, and reduce size.
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Finch Andrew
Kissa Karl
McBrien Gregory J.
Munks Timothy C.
Wooten Ed
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
Ben Loha
JDS Uniphase Corporation
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