Optical branching device

Details Optical branching device Optical branching device

2005-01-18

2005-01-18

Lee, John D. (Department: 2874)

Optical waveguides

With optical coupler

Particular coupling structure

C385S043000

Reexamination Certificate

active

06845196

ABSTRACT:
The optical branching device includes an input optical waveguide for outputting light inputted from a light input end face to a light output end face, a tapered optical waveguide having one end face connected to the light output end face and a width expanding at a predetermined angle, and branching optical waveguides connected to the other end face of the tapered optical waveguide at a predetermined branching angle, in which when a propagation constant of a leaky mode is βL, a propagation constant of a fundamental mode is β0, a meander period is Λ, and Λ=2π/(β0-βL), an optical waveguide length L from a position which becomes a cause of the leaky mode to the light output end face is substantially integer times Λ/2.

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Soldano et al., “Optical Multi-Mode Interference Devices Based on Self-Imaging: Principles and Applications”, Journal of Lightwave Technology, vol. 13, No. 4, 1995, pp. 615-627.
Hida et al., “Properties of tandem-aligned silica-based Y-branch optical waveguides”, Proceedings of Japanese Society of Applied Physics Annual Conference, 10p-ZN-16, 1991.

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