Strip loaded waveguide with low-index transition layer

Details Strip loaded waveguide with low-index transition layer Strip loaded waveguide with low-index transition layer

2006-10-24

2006-10-24

Pak, Sung (Department: 2874)

Optical waveguides

Planar optical waveguide

Thin film optical waveguide

C385S014000, C385S132000

Reexamination Certificate

active

07127147

ABSTRACT:
A strip loaded waveguide comprises a slab and a strip, wherein the strip is separated from the slab. Nevertheless, a guiding region is provided for propagating an optical mode and this guiding region extends both within the strip and the slab. A layer of material having an index of refraction lower than that of the strip and the slab may be disposed between and separate the strip and the slab. In one embodiment, the slab comprises a crystalline silicon, the strip comprises polysilicon or crystalline silicon, and the layer of material therebetween comprises silicon dioxide. Such waveguides may be formed on the same substrate with transistors. These waveguides may also be electrically biased to alter the index of refraction and/or absorption of the waveguide.

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