| 摘要 |
PURPOSE: To make it possible to maintain reliability over a long period of time without the impartation of stresses on the welded part between a cap and a lens holder even if the terminals of a header are connected by soldering to the electronic circuits in a casing packaged in the electronic circuits by fixing a flange welded and fixed to a cap covering a photoelectric conversion element to this casing. CONSTITUTION: The cap 3 mounted at the header 2 mounted with the photoelectric conversion element 1 is arranged at one end of the lens holder 8 and a ferrule inserted into a sleeve 12 is arranged at the other end of the lens holder 8. On the other hand, the flange 13 is provided with a mounting hole sized to be fitted with the outside diameter of the cap 3 in its central part and is welded and fixed in this position by a YAG laser. The optical coupler assembled in such a manner is mounted by directly fastening the coupler to the easing packaged with the electronic circuits of a driver for driving the photoelectric conversion element 1, etc. The terminals 2a disposed at the header 2 are connected to the electronic circuits in the casing at this time. |
