In the paper, the influence of temperature variation on the sensitivity of an avalanche-photodiode-based optical receiver applied in the free space optical communication link is discussed. Communication systems of this type are exposed to a wide range of operating temperatures, which markedly affect many photodiode and preamplifier parameters. The paper presents a receiver sensitivity calculati...

In the present work we model a Multiquantum Well structure Separate Absorption and Charge Multiplication Avalanche Photodiode (MQW-SACM-APD), while the Absorption region coincide with the MQW. We consider the nonuniformity of electric field using split-step method in active region. This model is based on the carrier rate equations in the different regions of the device. Using the model we obtai...

The calculation of symbol-error probabilities for uncoded pulse-position modulation using a Webb-modeled avalanche photodiode receiver in the presence of additive Gaussian thermal noise is discussed. Performance curves for 256-ary pulseposition modulation obtained through Monte Carlo simulation as well as a numerical upper bound are presented. The Webb-plus-Gaussian model for the distribution o...

The simulation of current impulse response using random response time model in avalanche photodiode is presented. A random response time model considers the randomness of times at which the primary and secondary carriers are generated in multiplication region. The dead-space effect is included in our model to demonstrate the impact on current impulse response of thin avalanche photodiodes. Curr...

We report an automated characterization of a single-photon detector based on commercial silicon avalanche photodiode (PerkinElmer C30902SH). The photodiode is characterized by I-V curves at different illumination levels (darkness, 10 pW and 10 μW), dark count rate and photon detection efficiency at different bias voltages. The automated characterization routine is implemented in C++ running on ...

This paper describes the recent advances in semiconductor photodiodes for use in ultra-high-speed optical systems. We developed two types of waveguide photodiodes (WG-PD) — an evanescently coupled waveguide photodiode (EC-WG-PD) and a separated-absorption-andmultiplication waveguide avalanche photodiode (WG-APD). The EC-WGPD is very robust under high optical input operation because of its distr...