| 摘要 |
The purpose of the present invention is to provide an optical waveguide device that has little optical insertion loss even while achieving a decrease in size. Provided is an optical waveguide device having optical waveguides (5) formed on a substrate (4), and a merging/branching unit where optical waveguides branch or merge in at least a part of the optical waveguide, wherein: the merging/branching unit is configured so that a number N of optical waveguides (51) merge and then branch into a number M, greater than N, of optical waveguides (53, 54); at a position where the N optical waveguides and the M optical waveguides are directly connected to one another, an overall width (W1) of the N optical waveguides is smaller than an overall width (W2) of the M optical waveguides; and at this connection position, discontinuous stepped differences are formed on the outside contour of the optical waveguides. |
