| 摘要 |
PURPOSE:To obtain an optical fiber end face lens which does not lose the light converging function even if it is adhered directly to an optical waveguide film with an adhesive, by packing materials having a high refractive index in a spherical recess formed in the core part of the optical end face. CONSTITUTION:A spherical recess 2 is formed in a core part 11 on the end face of an optical fiber 1 where the core part 11 having the round section in the center is surrounded with a clad part 12, and a transparent high-refractive index material 3 which has a refractive index higher than that of the core part 11 is packed in this recess 2. In case of formation of this optical fiber end face lens, the core part 11 in one end of the optical fiber 1 is etched to form a recess part 13. The end face of the optical fiber 1 is heated for a short time with a propane gas flame or a weak oxyhyrogen flame to make the recess part 13 into the recess 2 having a smooth spherical curved surface. The transparent high-refractive index material 3 which has a refractive index higher than that of the glass of the core part 11 is packed in this recess 2, thus forming the end face lens. |
