Faraday rotator for an optical device

Details Faraday rotator for an optical device Faraday rotator for an optical device

1982-03-22

1985-06-11

Arnold, Bruce Y.

Optics: measuring and testing

Range or remote distance finding

With photodetection

350390, 356350, G01B 902, G01P 900

Patent

active

045224730

ABSTRACT:
A Faraday rotator has a non-magnetic garnet substrate with a ferrimagnetic garnet film epitaxially grown on the substrate. A magnet induces a magnetic field in the film for rotating the plane of polarization of a light-beam which strikes an end surface of the film at a predetermined angle. The substrate and film are composed of a material wherein the difference (.DELTA. a=a.sub.s -a.sub.f) between the lattice constant a.sub.s of the substrate and the lattice constant a.sub.f of the film satisfies .vertline..DELTA.a.vertline..ltoreq. 0.001A (angstrom).

REFERENCES:
patent: 4222668 (1980-09-01), Henry
Besser et al., "Film/Substrate Matching Requirements for Bubble Domain Formation in CVD Garnet Films", AIP Conference Proceedings, No. 5, pp. 125-129, 1972.
W. T. Stacy, "Dislocations, Facet Regions and Growth Striations in Garnet Substrates and Layers", Journal of Crystal Growth, 24/25 (1974), pp. 137-143.

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