Optical waveguides – Temporal optical modulation within an optical waveguide – Electro-optic
Patent
1996-05-30
1998-03-17
Palmer, Phan T. H.
Optical waveguides
Temporal optical modulation within an optical waveguide
Electro-optic
385 8, 385 1, 385 14, G02F 1035
Patent
active
057296413
ABSTRACT:
An optical device for modulating or interacting with radiation guided and propagating along an optical longitudinal axis of an optical waveguide, such as, an optical fiber, has a different directional geometry compared to conventionally comparable devices such as, for example, plasmon or planar surface modulators for optical fibers. The geometry includes a nonlinear, electro-optic medium formed between two spatially disposed electrodes. The medium/electrode sandwich is aligned along the waveguide longitudinal propagating axis and extends in a radial direction from the optical waveguide core with the inner end of the medium in spatial proximity to the waveguide core for evanescent coupling with the radiation field propagating in the waveguide. An applied electric field to the spatially disposed electrodes varies the refractive index of the electro-optic medium from just below the effective refractive index of the waveguide to just above the effective refractive index waveguide to induce a lossy condition on the propagating radiation. Modulation of the applied electric field will bring about intensity modulation of the propagating radiation.
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Chandonnet Alain
Fougeres Andre
Larose Gilles
Painchaud Yves
Carothers, Jr. W. Douglas
Palmer Phan T. H.
SDL Inc.
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