Optical waveguides – Temporal optical modulation within an optical waveguide – Electro-optic
Reexamination Certificate
2005-03-22
2005-03-22
Ullah, Akm Enayet (Department: 2874)
Optical waveguides
Temporal optical modulation within an optical waveguide
Electro-optic
C372S045013, C385S014000, C385S129000, C385S131000, C257S079000
Reexamination Certificate
active
06870969
ABSTRACT:
An apparatus and method for modulating a phase of optical beam with reduced contact loss. In one embodiment, an apparatus according to embodiments of the present invention includes a first region of an optical waveguide disposed in semiconductor material. The first region has a first conductivity type. The apparatus also includes a second region of the optical waveguide disposed in the semiconductor material. The second region has a second conductivity type, which is opposite to the first conductivity type. The apparatus also includes an insulating region disposed between the first and second regions of the optical waveguide. A first contact is coupled to the optical waveguide at a first location outside an optical path of an optical beam, which is to be directed through the optical waveguide. A first buffer of insulating material is disposed along the optical waveguide between the first contact and the optical path of the optical beam.
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Blakely , Sokoloff, Taylor & Zafman LLP
Ullah Akm Enayet
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