An avalanche photodiode (APD) is a photodiode type in a photodetector. Compared to ordinary photodiodes,
APD applies a high voltage to improve light sensitivity. Applying a high voltage can cause an avalanche
phenomenon, which amplifies the signal. This allows a highly sensitive signal to be obtained even in low light.
The most distinctive feature of Wisman's APDs is that they use a p-incidence structure. Most other companies
use N-incidence structures, especially short-wavelength light, where carriers are generated before the avalanche
layer and do not reach the depletion layer, so the avalanche effect cannot be 100% achieved and the sensitivity
decreases.
On the other hand, Wisman uses a precision P-incidence structure so that carriers generated by incoming light
near the surface can enter the avalanche layer with 100% certainty. There are no lattice defects in the crystal, so
it is a low noise device. In addition, since a stable P-layer can be formed, the avalanche voltage variation of each
device can be suppressed.
Main applications:
·PIN Photodiode · Photodiode · Photomultiplier tube (PMT) · Photodetector · Hybrid Photodetector · Flat Panel
Detector (FPD)
Wisman has a range of power supplies that can be used for avalanche photodiodes. Example:
MM; MMC; MG ; MMA; MCE;
