Optical waveguides – With optical coupler – Particular coupling function
Patent
1995-10-10
1997-01-28
Palmer, Phan T. H.
Optical waveguides
With optical coupler
Particular coupling function
385 31, 385 37, 385132, 372 40, 372 43, 372703, 257 63, G02B 627
Patent
active
055984924
ABSTRACT:
An optical device includes a body of a semiconductor material having a waveguide therein along which light flows and means for providing gain to the light. A layer of an amorphous or polycrystalline metallic-ferromagnetic material extends along the waveguide and means, such as a permanent magnet, provides a magnetic field to the metallic-ferromagnetic material layer. This provides an optical isolator of the Faraday rotation type which can be integrated with a variety of material systems including those commonly used to fabricate semiconductor lasers, arrays and amplifiers.
REFERENCES:
patent: 4746181 (1988-05-01), Hayakawa et al.
patent: 5388117 (1995-02-01), Nishimura
patent: 5408565 (1995-04-01), Levy et al.
Cohen Donald S.
Palmer Phan T. H.
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