| 摘要 |
A ferule structure for receiving an optical fiber composed of a core and a sheathing for covering the core exclusive of its end includes a core holder for holding the core; a sheath holder for holding the sheathing, communicating with the core holder and being located on an outer wall of the sheathing; and a metallic cylinder member for fixing the sheathing. The metallic member is formed integrally to the sheathing holder. The sheathing holder has a window from which the metallic cylinder member is partially exposed. The metallic cylinder member is caulked through the window so that the sheathing is compressed toward the core. In this configuration, the optical fiber and ferule can be surely secured to each other without using an adhesive.
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