| 摘要 |
In order to make it possible to suppress the influence of reflected light on a connection interface easily and with certainty, an optical waveguide device includes a first optical waveguide ( 1 ), a second optical waveguide ( 2 ) formed from a material or in a structure different from that of the first optical waveguide ( 1 ) and connected to the first optical waveguide ( 1 ), and a 1x1 multimode interference waveguide ( 3 ) formed by increasing the widths of the first optical waveguide ( 1 ) and the second optical waveguide ( 2 ) in the proximity of a connection interface between the first optical waveguide ( 1 ) and the second optical waveguide ( 2 ).
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