| 摘要 |
<p>The object of the present invention is to provide a highly reliable optical fixed attenuator and the manufacturing process thereof being free of the conventional cumbersome processes including the process for inserting the optical fiber into the ferrule and fixing thereto. In the present invention, the surface of an optical fiber is metalized to serve as an electrode of the electroforming process so that a metal layer to serve as the ferrule 11 is directly formed over the outside surface of the optical fiber 10, and, as a result, a long ferrule, wherein the optical fiber 10 and the metal layer are fully integrated, is made available, whereby an optical device to constitute the desired optical fixed attenuator can be obtained by simply cutting such a long ferrule to any desired length. When the attenuation film is to be used as an attenuator 19, the attenuation film is interposed between two ferrules 11, while when the doped attenuation fiber is to be used, the doped optical fiber 10 is used to constitute a long ferrule 11 so as to be cut to any predetermined length.</p> |
