Planar optical waveguide and process for its manufacture

Details Planar optical waveguide and process for its manufacture Planar optical waveguide and process for its manufacture

1985-09-13

1987-11-17

LaRoche, Eugene R.

350 9634, G02B 610

Patent

active

047070587

ABSTRACT:
Planar optical waveguide comprising a nonmagnetic substrate with a first magnetooptical layer produced epitaxially on the substrate, and a second magnetooptical layer produced epitaxially on the first magnetooptical layer. Both magnetooptical layers are composed of an iron garnet-based material. The second magnetooptical layer has a refractive index n which is approximately 1.times.10.sup.-3 to 1.times.10.sup.-2 greater than the refractive index of the first magnetooptical layer. The material of the magnetooptical layers contains at least one substituent at the dodecahedral sites of the garnet lattice, in particular lead. The proportions of lead are different in the materials of the first and the second magnetooptical layer. The optical waveguide can be used for optical single mode waveguides in the near infrared spectral range (0.8.ltoreq..lambda..ltoreq.1.6 .mu.m).

REFERENCES:
patent: 3995936 (1976-12-01), Hepner et al.
patent: 4236782 (1980-12-01), Castera et al.
Okamura, Y., et al. "Y-Branch Interferometer in YIG Film Grown by Liquid Phase Epitaxy." Applied Optics, vol. 23, No. 14, pp. 2420-2422 (Jul. 15, 1984).
Pistore, J., et al. "Mode Spectroscopy of Double-Layer Magnetic Garnet Films." IEEE Trans. on Magnetics, vol. MAG-20, No. 5, pp. 1057-1059 (Sep. 1984).
Shibukawa, A., et al, "Optical TE-TM Mode Conversion in Double Epitaxial Garnet Waveguide." Applied Optics, vol. 20, No. 14, pp. 2444-2450 (Jul. 15, 1981).
Tolksdorf, W., et al "Compositional Inhomogeneities Along the Growth Direction of Substituted Yttrium Iron Garnet Epilayers." Journal of Crystal Growth, vol. 52, pp. 722-728 (1981).

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