| 摘要 |
PURPOSE:To decrease reflective loss on the end surface of an optical fiber and on the surface of a light receiving element by a method wherein a light receiving or light emitting element is fixed on the end of an optical fiber passing through a package and of a sleeve which are placed in the package. CONSTITUTION:A circuit substrate 15 is attached 2 to a stem 1, and lead wires 6, 7 are sealed and fixed by solder glass. And a frame 13 is sealed and fixed to the stem by means of resistance welding or the like, and a sleeve 10 which has an optical fiber 9 within it passes through the side of the frame 13 to reach the interior of the package and it is sealed hermetically by solder glass 12. And a light receiving or light emitting element 3 is fixed by an adhesive agent 14 which is an optically transparent substance and has a nearly equal refractive index to the fiber core onto the fiber 9 and onto the end surface of the sleeve 10 which are positioned inside the package. Each lead wire 4, 5 is taken out from front and back planes by means of soldering in this element 3 before attaching them, and through fixing the chip onto the surface of the fiber and attching them by soldering to a proper pad on the substrate 15 a circuit is completed. |
