Noise properties and time response of the staircase avalanche photodiode
Abstract
The staircase avalanche photodiode is a novel gradedgap superlattice device that is expected to detect photons quite noiselessly. It is designed in such a way that only electrons impactionize, thereby eliminating the feedback noise associated with conventional twocarrier avalanche devices. Because the electron multiplication can accur only at a small number of discrete locations in the device, the variability of the number of electrons generated per detected photon is minimized. The excess noise and the electron counting distribution are obtained as a function of the number of stages in the device and the impactionization probability per stage, for instantaneous multiplication. The (singlephoton) impulse response function is calculated when the effects of (random) transit time are incorporated into the carrier multiplication process. Inclusion of the time dynamics is essential for determining the time course of the current generated by the device in response to pulses of light. This, in turn, permits hit error rates to be calculated for systems incorporating the device. For a fivestage quaternary device the gainbandwidth product is calculated to be in the vicinity of 600 GHz.
 Publication:

Journal of Lightwave Technology
 Pub Date:
 December 1985
 DOI:
 10.1109/JLT.1985.1074334
 Bibcode:
 1985JLwT....3.1223M
 Keywords:

 Avalanche Diodes;
 Noise Spectra;
 Photodiodes;
 Photometers;
 Superlattices;
 Time Response;
 Aluminum Gallium Arsenides;
 Fiber Optics;
 Gallium Antimonides;
 Mathematical Models;
 Optical Communication;
 Signal To Noise Ratios;
 Electronics and Electrical Engineering;
 NOISE;
 PHOTODIODES