| 摘要 |
In this optical fiber device (1), a fiber connection part (7) is provided with a laser light path part (73) formed to a hollow shape, to allow laser light incident on a core (21a) to pass through the interior. The laser light path part (73) is provided with an aperture part (73b) formed to an inside width dimension smaller than the outside width dimension of the core (21a), and an abutting part (73c) arranged at the end at the downstream side, and formed to an inside width dimension larger than the outside width dimension of the core (21a), so as to abut the end surface at the light incidence side of an optical fiber part (2) in a section thereof to the outside of the core (21a). |
