Optical coupler and method for producing the same

Details Optical coupler and method for producing the same Optical coupler and method for producing the same

1996-06-06

1997-07-29

Ullah, Akm E.

Optical waveguides

With optical coupler

Input/output coupler

G02B 632

Patent

active

056528167

ABSTRACT:
An optical coupler of the present invention includes: an optical waveguide including a substrate, a first dielectric layer formed on the substrate, a second dielectric layer which is formed on the first dielectric layer and has a refractive index lower than a refractive index of the first dielectric layer, and a third dielectric layer which is formed on a part of the second dielectric layer and has a refractive index equal to or lower than the refractive index of the second dielectric layer; and a light introducing portion made of a transparent material having a refractive index higher than the refractive index of each of the dielectric layers, the light introducing portion being formed on the optical waveguide and introducing converged incident light into the optical waveguide, wherein the light introducing portion is provided across a surface of the second dielectric layer and a surface of the third dielectric layer and has, as a light incident surface, a flat portion allowing the incident light introduced into the optical waveguide to pass through without eclipse.

REFERENCES:
patent: 4695123 (1987-09-01), Chang et al.
patent: 5259049 (1993-11-01), Bona et al.
patent: 5371817 (1994-12-01), Revelli, Jr. et al.
patent: 5418871 (1995-05-01), Revelli, Jr. et al.
patent: 5563838 (1996-10-01), Wojnarowski et al.
patent: 5574811 (1996-11-01), Brincheno et al.

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