| 摘要 |
PURPOSE:To make it unnecessary to change the specification for each optical fiber to be used by coupling an optical fiber and a photosensitive or a light emitting element through a guide beam fiber in the same diameter as the narrowest fiber among those connected with an optical coupler. CONSTITUTION:A guide beam fiber 5 consisting of a core 5a and clad 5b is provided between a housing 2a and an optical connector coupler 2b and positioning should be made with a spacer so that the core 5a and an optical fiber 4 are aligned on the same axis. Moreover, as a fiber 5, the narrowest fiber among the optical fibers connected to an optical coupler 20 is used. Therefore, when the fiber 4 is coupled with an optical element 2 by the optical coupler 20, the optical element 1 is coupled with the end face of the fiber 5 without relation to the core diameter 4a and the coupling coefficient can substantially be kept constant without relation to the core diameter of connected fiber 4. |
