| 摘要 |
<p>The invention relates to an optoelectronic device comprising a semiconductor laser enclosed in an envelope, an optical fibre coupled to the semiconductor laser, and further coupled to at least one optical isolator and an outgoing optical fibre (pigtail). According to the invention, the semiconductor laser (3) and the optical isolator (17) are each enclosed in a separate module. The laser module (1) mainly provides space to the semiconductor laser (3) and to an optical fibre (9) coupled thereto and ending in a ferrule (13) in a tubular projection (12) of the laser module. The module (16) for the optical isolator is tubular in shape and contains in that order a first graded index lens (18), an optical isolator (17), a second graded index lens (13), and an outgoing optical fibre (pigtail) (20) coupled to this second graded index lens through a ferrule. The tubular projection of the laser module and an end portion of the tubular optical module are so shaped in relation to one another that a mechanical coupling of the two modules can be obtained whereby the optical coupling between the modules is achieved simultaneously. In such a device, there are no restrictions as to the technology for optically coupling the fibre and the laser, the manufacture is simple and testing of the components is possible before assembly. It is also possible to use several isolators or isolators of different types, while the module construction is maintained. <IMAGE></p> |
