What is the avalanche photodiode?

There are many applications in which light is converted into electrical signals, including optical fiber communication systems. One component that can do it is avalanche photo (APD). The particles called hub carriers enter the diode and are exposed to an electric field. In a process called avalanche, particles are generated by collisions and light particles called photon can generate many electrons to create an electric current. Optical receivers usually include avalanche photodiode and photon counters and the range used in cars, construction and even hunting. The electric field triggers the process when the light enters the diode. There are different types of APDs that can work according to the wavelength of the light that enters them. They are made of silicon, the spectral range is usually 300 to 1100 nanometers, while the avalanche of germaniumphotodium is often suitable for wavelengths of light from 800 to 1600 nanometers. Another version made of India, Gallia and Arsen can work with 900 to 1700 wavelengthnanometers. Larger diodes can get more light than smaller and eliminate the need for other optical components that can add expenses. The use of smaller varieties is beneficial when the semiconductor space is limited. The APD is generally the best when the light intensity is relatively low, but medium to high frequency detection is required.

Silicone components with positive and negative electric charges are often used in avalanche photodiode. The setting usually creates a voltage bias that refers to the voltage as higher at one end than on the other. The decomposition voltage is the smallest amount of current that a trigger diode can be conducted. The avalanche effect can continue if the carrier particles are accelerated high enough. The voltage of bias must usually be higher than the disintegration; If it is less, then friction can cause the particles to slow down.

Transmission capacity of the optical systemU is often dependent on the type of avalanche photodiode used. The distance measurement systems, such as operating speed weapons for law enforcement, as well as the extent of hunters used by hunters can also benefit. Avalanches are often part of laser sensors found in port navigation systems, reconnaissance devices, or machines that need to feel the proximity of people and equipment. They can also be part of the warning warning systems for car drivers.