Optical waveguides – Planar optical waveguide – Thin film optical waveguide
Patent
1993-02-22
1995-04-18
Gonzalez, Frank
Optical waveguides
Planar optical waveguide
Thin film optical waveguide
385 6, 385131, G02B 610
Patent
active
054085659
ABSTRACT:
In a polarization rotator device, a thin-film magneto-optic medium is magnetized by a thin-film magnet. To serve as an optical isolator, the device may include polarizers. In such an optical isolator, in which the magneto-optic medium was formed as a Bi-YIG triple-layer structure, and the thin-film magnet as a single-crystal iron-cobalt layer, an extinction ratio better than -20 dB was realized.
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Levy Miguel
Osgood Richard M.
Gonzalez Frank
The Trustees of Columbia University in the City of New York
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