Light branching optical waveguide

Details Light branching optical waveguide Light branching optical waveguide

2005-05-25

2010-11-23

Le, Uyen-Chau N (Department: 2874)

Optical waveguides

With optical coupler

Particular coupling structure

C385S015000, C385S042000

Reexamination Certificate

active

07840108

ABSTRACT:
Provided is a light branching optical waveguide including: at least one incident light waveguide (A) optically connected to one end of a multi-mode optical waveguide; and output light waveguides (B) larger in number than the incident light waveguide (A) optically connected to the other end thereof, the light branching optical waveguide being characterized in that: an intensity distribution of light incident from at least one optical waveguide (a) out of the incident light waveguide (A) on the multi-mode optical waveguide at a connecting surface of the incident light waveguide (A) and the multi-mode optical waveguide is asymmetric with respect to a geometrical central axis of the optical waveguide (a); and an extended line of the geometrical center axis of the optical waveguide (a) does not coincide with a geometrical central axis of the multi-mode optical waveguide. Accordingly, it is possible to obtain a low-loss light branching optical waveguide having a reduced branch loss and a reduced variation in branching ratio, and further to obtain a light branching optical waveguide having small wavelength dependence as well as a reduced branch loss and a reduced variation in branching ratio.

REFERENCES:
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patent: 6970625 (2005-11-01), Johannessen et al.
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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 (Apr. 1995), pp. 615-627.

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