Patent ID: 7492995
Filing Date: 2009-02-17
Classification: G02B

Abstract:
1. An optical element combination structure in which an optical fiber and an optical waveguide are combined with each other comprising: an optical fiber and a substrate on which an optical waveguide to be aligned with the optical fiber is formed; wherein the substrate has a V-shaped cross-sectional groove opening upward and formed so that, when the optical fiber is disposed onto the V-shaped cross-sectional groove, the optical fiber and the optical waveguide are aligned with each other, and a recess forming a space on a waveguide side relative to the V-shaped cross-sectional groove; the space opening upward and extending downward beyond the V-shaped cross-sectional groove; wherein the optical fiber is disposed onto the V-shaped cross-sectional groove so that a tip of the optical fiber protrudes into the recess, and is secured to the V-shaped cross-sectional groove with a fiber adhesive; wherein the tip of the optical fiber and the optical waveguide are coupled to each other with a fiber-coupling agent with which the recess and a space between the optical fiber and the optical waveguide are filled; and wherein the substrate further has an upper surface on which the V-shaped cross-sectional groove is formed; further comprising a holding member disposed to sandwich the optical fiber with the upper surface and spaced from the upper surface, the holding member having a wide groove which is disposed over the optical fiber and is wider than an outer diameter of the optical fiber; wherein, with the fiber adhesive, a space between the wide groove and the optical fiber and a space between the holding member and the upper surface are filled.