Patent ID: 7925130

Claim:
An optical waveguide comprising: a waveguide core through which light propagates; a cladding that surrounds the waveguide core and has a refractive index that is less than the refractive index of the waveguide core; a metal layer that is formed on a surface of at least one end of the optical waveguide in a longitudinal direction, the surface being inclined so as not to be perpendicular to the longitudinal direction; and a channel that is formed at a portion of an outer surface of the cladding, the outer surface forming an acute angle with the inclined surface, and the channel being positioned below the inclined surface when the optical waveguide is placed with the outer surface facing down, wherein the channel is formed so as to extend to at least one edge in a width direction of the outer surface of the cladding that forms an acute angle with the inclined surface.