Silicon Avalanche Photodiode

A Silicon Avalanche Photodiode (APD) is a highly sensitive light detector made from silicon that can detect even very faint light signals. When light hits the diode, it creates a small electrical charge. The device then uses an internal process called "impact ionization" to amplify this signal, producing a much stronger electrical output. This makes APDs ideal for applications like fiber-optic communication, scientific measurements, and medical imaging, where detecting weak light signals accurately and quickly is essential. Essentially, it converts light into a strong, clear electrical signal for precise measurement and analysis.