| 摘要 |
A photodetector module contains a package (1), a photodiode (3), a preamplifier (4), a bypass capacitor (2), a cap (7) with a lens (6) and a sleeve (8). A parallel plate capacitor (2) is used as the bypass capacitor. The parallel plate capacitor (2) is mounted at the center of the package. The photodiode (3) is stuck on the parallel plate capacitor. Since the photodiode is mounted upon the capacitor, the module optimises the area for mounting a capacitor. The fiber, the lens, the photodiode and the capacitor align along a central line with rotational symmetry. The two-story structure reduces the size of the module and the cost of production by decreasing the number of the parts and the steps of production. <IMAGE> |
