| 摘要 |
PROBLEM TO BE SOLVED: To substantially obviate the occurrence of difficulty in workability in putting into packages even in the case a substrate is obliquely connected by producing optical waveguide elements by cutting the substrate in such a manner that optical waveguide ends have an finite angle from perpendicularity to their end face and that the direction of the phase shift optical waveguides is not aligned to the ridge line direction of the flanks of the substrate. SOLUTION: The substrate is cut in such a manner that the optical axis at the ends of the optical waveguides 14 and the normal of the cut surfaces (element coupling end faces 4) attain an angle ofα=5.4 to obtain the plural optical waveguide elements 1 of a parallelogram. On the other hand, the fiber coupling end face 23 of the optical fiber 20 to be optically coupled to the element coupling end face 4 of each of these optical waveguides 14 is formed by polishing in such a manner that the normal thereof attains the angle ofβ=8.0 deg.. A UV curing type adhesive is used for optical coupling of the element coupling end face 4 and the fiber coupling end face 23. The state that the entire part is crooked by the flexing as a result of connection of the optical fiber 20 and the optical waveguide element 1 is drastically reduced is such a manner. |
