| 摘要 |
PROBLEM TO BE SOLVED: To suppress transmission loss of an optical coupling structure caused by a mirror.SOLUTION: An optical coupling structure includes a light source 1 and an optical waveguide 2. The light source 1 emits light 4. The optical waveguide 2 has a mirror surface 3 for reflecting the light 4 emitted from the light source 1 at one end 5. The optical waveguide 2 guides the light 4 reflected by the mirror surface 3 to the other end 6. The traveling direction of the light 4 emitted from the light source 1 tilts to a normal direction N-N of the mirror surface 3 at an angle larger than 45° toward the one end 5 of the optical waveguide 2. Further, the traveling direction of the light 4 emitted from the light source 1 tilts to the normal direction N-N of the mirror surface 3 at an angle satisfying a condition of total reflection of the light 4 on the mirror surface 3. Furthermore, the traveling direction of the light 4 emitted from the light source 1 tilts to the normal direction N-N of the mirror surface 3 at an angle satisfying a condition of total reflection of the light 4 in the optical waveguide 2. |
