Owing to their high sensitivity, low noise, and fast response, APDs have been widely used in optical communications, lidars, and other sensing technologies. Advantages: Low noise, cost-effective, suitable for short-range applications (e. Avalanche. Despite their numerous benefits, avalanche photodiodes also have some limitations: Temperature dependence: APDs are sensitive to temperature changes, which can affect their performance. Temperature variations can influence the avalanche multiplication factor and lead to increased noise. Here, SNR is S/N = Power from the photocurrent/photo detector's power + Amplifier noise power For. This curve is temperature dependent. APDs belong to a category of photodetectors that can sense incident light signals and convert them into enlarged electrical outputs via avalanche gain.
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