| 摘要 |
PURPOSE:To prevent the breaking of a holder or core element wire resulting from that the holder contacts the core blank material directly, by removing a tube at the input and output ends of an optical fiber and holding the optical fiber covered with a clad layer. CONSTITUTION:Both ends of the core element wire 1 of the optical fiber are covered with the clad layer 2 having a less refractive index than the core element wire, and the air layer between the tube and core element wire serves as a clad at a core element wire part which is not covered with the cald layer. In a figure, 4 is a holder for the fiber and 5 is a clamp; the clad layer 2 is clamped by a filler 6 and the optical fiber is fixed to the holder. Further, the holder 4 holds the tube 3 fixedly with a clamp 7 and a filler 8. The input end of the fiber fixed at the core element wire, tube, and reinforcing projection layer is sealed with the cylindrical body consisting of a lens holder 12 for holding a condenser lens 13 and a lens clamp 14, protecting the fiber end surface. |
