| 摘要 |
A photodetector module contains a package, a photodiode, a preamplifier, a bypass capacitor, a cap with a lens and a sleeve. A parallel plate capacitor is used as the bypass capacitor. The parallel plate capacitor is mounted at the center of the package. The photodiode is stuck on the parallel plate capacitor. Since the photodiode is piled upon the capacitor, the module curtails the area for mounting a capacitor. The fiber, the lens, the photodiode and the capcitor 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.
|
