An equivalent circuit model and biasing effects over the gain and bandwidth of waveguide avalanche photodetectors (WG-APDs)

Waveguide photodetectors (WG-PDs) are a promising candidate to overcome the trade-off between the quantum efficiency and bandwidth in conventional photodetectors. In this paper, complete physics and circuit models of waveguide-separated absorption grading charge multiplication-avalanche photodetector (WG-SAGCM-APD) are presented. In this model, the effects of the biasing, doping and the thicknesses of the different layers of the photodetectors, …