Optical waveguides – Temporal optical modulation within an optical waveguide
Reexamination Certificate
2005-03-01
2005-03-01
Healy, Brian (Department: 2874)
Optical waveguides
Temporal optical modulation within an optical waveguide
C385S002000, C385S131000, C438S031000
Reexamination Certificate
active
06862376
ABSTRACT:
A method of manufacturing a monolithic expanded beam mode electroabsorption modulator including a waveguide layer with a two expansion/contraction sections and an electroabsorption section arranged along a longitudinal axis. At least one patterned growth retarding layer is formed on the top surface of a substrate. The waveguide layer is formed on a portion of the top surface of the substrate by selective area growth and has an index of refraction different from the substrate. An electroabsorption portion of the waveguide layer has a thickness which is greater than thicknesses in its other portions. The semiconductor layer is formed on the waveguide layer and includes an index of refraction different from the waveguide. The waveguide and semiconductor layers are defined and etched to form the expansion/contraction and electroabsorption sections of the waveguide layer. Electrical contacts are formed, one electrically coupled to the substrate and another electrically coupled to the semiconductor layer.
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Bond Aaron
Choi Won Jin
Jambunathan Ram
Healy Brian
Lin Tina M
RatnerPrestia
T-Networks, Inc.
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