Optical waveguides – Temporal optical modulation within an optical waveguide – Electro-optic
Reexamination Certificate
2006-09-19
2008-11-25
Bovernick, Rodney (Department: 2874)
Optical waveguides
Temporal optical modulation within an optical waveguide
Electro-optic
C385S003000, C385S030000, C385S050000
Reexamination Certificate
active
07457487
ABSTRACT:
SiGe quantum wells where the well material has a lowest conduction band energy minimum at k=0 (the Γ point of the first Brillouin zone) are provided. Quantum well structures that satisfy this condition have “Kane-like” bands at and near k=0 which can provide physical effects useful for various device applications, especially optical modulators. In the Si1-xGexmaterial system, this condition on the band structure is satisfied for x greater than about 0.7. The quantum well barrier composition may or may not have Kane-like bands. Embodiments of the invention having a surface parallel configuration are especially suitable for use in fiber coupled devices. Such surface parallel devices have light propagating in the plane of the quantum wells, in a device geometry that is preferably not single-mode waveguided.
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Harris, Jr. James S.
Kuo Yu-Hsuan
Miller David A. B.
Bovernick Rodney
Lumen Patent Firm
Rojas Omar
The Board of Trustees of the Leland Stanford Junior University
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