Optical waveguide connector

1. An optical waveguide connector comprising:

a connector body having an insertion hole that is connectable to an optical waveguide by inserting an end portion of the optical waveguide, the optical waveguide including a core and a clad that surrounds the core, the insertion hole having a bottom surface, the bottom surface being configured to be bonded to the end portion of the optical waveguide with an adhesive interposed between the bottom surface and the end portion; and

a first convex portion provided on the bottom surface of the insertion hole so that the first convex portion faces the core of the optical waveguide when the optical waveguide is inserted, the first convex portion including an incident surface that receives light from the optical waveguide, the incident surface being larger than an end surface of the core of the optical waveguide to be inserted.

2. The optical waveguide connector according to claim 1 , further comprising:

a second convex portion provided on the bottom surface of the insertion hole so that the second convex portion faces the clad of the optical waveguide; and

a concave portion provided on the bottom surface of the insertion hole, the concave portion being located between the first convex portion and the second convex portion.

3. The optical waveguide connector according to claim 1 ,

wherein a refractive index of the first convex portion is higher than a refractive index of the adhesive.

4. The optical waveguide connector according to claim 3 ,

wherein the first convex portion is capable of transmitting the light by reflecting the light at a boundary surface between the first convex portion and the adhesive, the boundary surface being different from the incident surface.

5. The optical waveguide connector according to claim 1 , further comprising:

a lens which is formed integrally with the first convex portion; wherein

light which is emitted from the end surface of the core to be transmitted through the first convex portion is emitted through the lens or light which is incident through the lens to be transmitted through the first convex portion is emitted to the end surface of the core.

6. An optical waveguide connector comprising:

a connector body having an insertion hole that is connectable to an optical waveguide by inserting an end portion of the optical waveguide, the optical waveguide including a core and a clad that surrounds the core, the insertion hole having a bottom surface, the bottom surface being configured to be bonded to the end portion of the optical waveguide with an adhesive interposed between the bottom surface and the end portion; and

a first convex portion provided on the bottom surface of the insertion hole so that the first convex portion faces the core of the optical waveguide when the optical waveguide is inserted, the first convex portion including an incident surface that receives light from the optical waveguide, the incident surface being smaller than an end surface of the core of the optical waveguide to be inserted and being smaller than an end surface of the optical waveguide.

7. The optical waveguide according to claim 2 , wherein

both the first convex portion and the second convex portion project toward the end surface of the optical waveguide from the bottom surface.

8. The optical waveguide connector according to claim 1 ,

wherein the first convex portion is configured to be bonded with the end portion of the optical waveguide with the adhesive interposed.