Waveguide device
AssigneeNEC Corporation
InventorTadahiko Hanada
Life of this patent
Estimating the term…
Abstract
Bent waveguide parts 131 and 132 on a substrate 121 of an arrayed waveguide chip 104 have a core dimension allowing multi-mode operation, but they are adapted to constitute higher order mode filters with adequate combination of the relation of the height and width of waveguides and the minimum radius of curvature. Thus, with the multi-mode as preamble it is possible to cut off higher order mode light propagation by setting a small minimum radius of curvature, thus realizing single-mode light propagation and reducing the optical coupling loss through optical fibers 111 and 112. Thus, it is possible to realize a waveguide chip and a waveguide device with the minimum radius of curvature of bent waveguides and less optical coupling loss in connection parts to optical fibers.
Claims12
A waveguide chip having core dimension in which multi-mode are excited and having one or more bent waveguides having a radius of curvature capable of suppressing higher order mode propagation.
A waveguide device comprising;
- single-mode optical fibers;
- and a waveguide chip including optical fiber connection having a spot size substantially equal to the spot size of the single-mode optical fibers allowing multi-mode excitation of the optical connection parts and optically connected to the single single-mode optical fibers, and bent waveguide parts having a radius of curvature for suppressing higher order mode propagation.
Dependencies are inferred from the claim text.