### TECHNICAL NOTES

**V803 – Avalanche Photodiode Receiver Performance Metrics**

*This note overviews the calculations used to assess the noise equivalent power (NEP), noise equivalent input (NEI), and signal to noise ratio (STN) performance of avalanche photodiodes (APDs) and APD photoreceivers. Shown are the effects of the APD’s effective ionization constant, k _{eff}, which characterizes the noise of the avalanche process.*

**V808 -Method of Estimating APD Ranging Receiver Sensitivity**

*This technical note overviews the methodology used to calculate the sensitivity of an APD receiver configured with an amplifier and threshold pulse detection circuits. This calculation assumes a photoreceiver of the general format shown in the figure immediately below.*

**V720 -Testing of Geiger Mode APDs (GmAPs)**

*This not reviews the processes uses to test Geiger Mode Avalanche Photodiodes (APDs)*

**V805 -Separate Absorption, Charge, and Multiplication (SACM) Avalanche Photodiode Design**

This note reviews basic avalanche photodiode (APD) design theory.

**V807 -Photon-Counting Avalanche Photodiodes – A Primer**

This note discusses avalanche photodiodes (APDs) in the context of photon-counting systems. It includes an overview of the basic photon-counting problem, a review of the relevant noise theory, and an in-depth discussion of APD design.