| 摘要 |
PROBLEM TO BE SOLVED: To provide a bundled fiber that can guide more light beams into the bundled fiber in the incident end face and that makes manufacturing possible at a low cost. SOLUTION: In the bundled fiber for which a plurality of optical fibers are bundled, a material exposed to the light incident end face is composed of a plurality of materials in which those constituting the core has an area ratio of 70% or above. Also, in the bundled fiber, the materials exposed to the light incident end face can be alternatively composed of a single material. Incidentally, the incident end face of the bundled fibers is formed by fusing and integrating the plurality of optical fibers into one body. COPYRIGHT: (C)2006,JPO&NCIPI
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