| 摘要 |
There are provided an optical waveguide including: a substrate 1; a lower clad layer 2; a core pattern 3 with a taper in thickness direction; and an upper clad layer 4, the lower clad layer, the core pattern, and the upper clad layer being sequentially laminated on the substrate 1, in which the lower clad layer 2 has a cutting part 5. There also provided with an optical waveguide including: a substrate 1; a lower clad layer 2; a core pattern 3 with a taper in thickness direction; and an upper clad layer 4, the lower clad layer, the core pattern, and the upper clad layer being sequentially laminated on the substrate 1, in which the lower clad layer 2 has a dummy part on the top. These optical waveguides can secure alignment tolerance when connected with an optical element.
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