Optical waveguide circuit with intersections

Details Optical waveguide circuit with intersections Optical waveguide circuit with intersections

1990-08-30

1992-10-20

Lee, John D.

Optical waveguides

Planar optical waveguide

385 14, G02B 610

Patent

active

051577569

ABSTRACT:
An optical waveguide circuit comprises intersections each including two optical waveguides which intersect with each other by a predetermined intersecting angle. The intersection includes an island region and a peripheral region surrounding the island region. The peripheral region has a refractive index which is lower than that of optical waveguides, so that an intersecting loss is lowered.

REFERENCES:
patent: 4130342 (1978-12-01), McMahon
patent: 4382655 (1983-05-01), Jamieson
patent: 4693546 (1987-09-01), Lorenzo et al.
patent: 4693547 (1987-09-01), Soref et al.
patent: 4728167 (1988-03-01), Soref et al.
patent: 4961619 (1990-10-01), Hernandez-Gil et al.
T. O. Murphy et al., "Reduced Waveguide Intersection Losses for Large Tree Structured Ti:LiNbO.sub.3 Switch Arrays", Inst. of Elec. Information and Communications Engineers-technical report, OQE 88-147, 1988
"Reduction of Crosstalk and Losses of Intersecting Waveguide", Electronics Letters, vol. 25, No. 11, May 25, 1989, pp. 730-731.
"Electro-Optic X-Switch Using Single-mode Ti:LiNbO.sub.3 Channel Waveguides", Electronics Letters, vol. 19, No. 14, Jul. 7, 1983, pp. 553-554.

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