Optical coupling element and optical device

Details Optical coupling element and optical device Optical coupling element and optical device

2006-05-16

2006-05-16

Pak, Sung (Department: 2874)

Optical waveguides

With optical coupler

Particular coupling structure

C385S039000, C385S129000

Reexamination Certificate

active

07046880

ABSTRACT:
An optical coupling element for optically coupling an optical element formed on a substrate to an external optical element disposed adjacent to the substrate, including a first optical waveguide section formed on the substrate and having a smaller width on the side of the external optical element than a width on the side of the optical element, and a second optical waveguide section formed on the substrate and connected to the first optical waveguide section on the side of the external optical element, and having a smaller width on the side of the external optical element than a width on the side of the optical element and having a shorter length than a length corresponding to twenty wavelengths of the optical signal. The optical waveguide section can optimize the optical coupling efficiency, and the optical waveguide section can suppress residual reflections.

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