Optical communications – Transmitter – Including optical waveguide
Reexamination Certificate
2005-04-04
2009-08-18
Li, Shi K (Department: 2613)
Optical communications
Transmitter
Including optical waveguide
C398S193000, C398S201000
Reexamination Certificate
active
07577369
ABSTRACT:
A transmitter on an integrated circuit chip is disclosed that employs a laser, modulator, and a dispersion compensator module and a modulator for overcoming chromatic dispersion and polarization dependent loss effects. With the present invention, the dispersion compensator module is placed on a chip, either integrated or monolithic, for operation with a laser and a modulator without the need to compensate for dispersion within a separate unit that is not part of the chip. The dispersion compensator module can be implemented, for example, with a ring resonator, an etalon or a Mach-Zehnder interferometer. In a first aspect of the invention, the optical transmitter module of the present invention provides a cost-effective solution for upgrading from an existing optical network to a faster optical network, such as upgrading from a 2.5 Gbps to a 10 Gbps network. In a second aspect of the invention, the optical transmitter module of the present invention provides a means to deploy an optical network at the transmission rate of 10 Gbps, 40 Gbps and faster.
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Barbarossa Giovanni
Hajjar Roger A.
Avanex Corporation
Li Shi K
Patterson & Sheridan L.L.P.
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