| 摘要 |
PURPOSE: To provide such a structure that a semiconductor laser chip, lens, optical fiber, electric circuit to drive the laser are tightly sealed from air in an optical transmission module and the countermeasure against electromagnetic waves can be done. CONSTITUTION: The exit port of the laser light of a semiconductor laser chip, and moreover, the semiconductor laser chip 1 itself are covered with a resin and tightly sealed. The end face 6 of an optical fiber 5 which receives the laser light from the semiconductor laser chip is also covered with the resin 2. Further, a lens for optical coupling is covered with the resin 2. Thus, the optical coupling part from the semiconductor laser chip to the optical fiber in the optical transmission module is tightly sealed with the resin and protected. |
