Refractive optical waveguide interface and lens

Details Refractive optical waveguide interface and lens Refractive optical waveguide interface and lens

1986-06-20

1988-07-05

Lee, John

350 9611, G02B 610

Patent

active

047550147

ABSTRACT:
An integrated optical waveguide structure which provides for efficient, single-mode propagation of light across an interface between two contiguous waveguide layers of differing effective refractive index. The waveguides are formed by layers of increased index of refraction formed at the surface of a substrate and serve to support propagation of optical electromagnetic radiation along the surface of the substrate. A refractive interface is provided at the interface of two such surface layers supporting modes of differing effective indexes of refraction. By underlying one of the surface layers with an additional layer having a particular, but different, index of refraction, a single mode of propagation is supported throughout both of the surface waveguides. General applications in the formation of optical waveguide components as well as a more extensive treatment with the formation of a lens is also disclosed using proton exchange in crystalline LiNbO.sub.3.

REFERENCES:
patent: 4141621 (1979-02-01), Aagard et al.
patent: 4606602 (1986-08-01), Unger et al.

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