Monte Carlo Simulation of Excess Noise in Heterojunction Avalanche Photodetector

Avalanche photodetectors (APDs) are important optoelectronic devices used in the detection of very low optical signals in fibre-optic communication systems. The advantage of high gain mechanism through carrier multiplication in materials is exploited in designing the APDs. The use of random path length (RPL) model in the framework of Monte-Carlo (MC) method has proved to yield results in agreement with the observed experimental values.