diodilasers

Diode lasers are semiconductor devices that emit laser light when an electric current passes through them. They are one of the most common types of lasers due to their small size, efficiency, and affordability. The active medium in a diode laser is a p-n junction, typically made from materials like gallium arsenide (GaAs) or indium phosphide (InP). When forward-biased, electrons and holes recombine in this junction, releasing energy in the form of photons. These photons are then amplified within an optical cavity, leading to the emission of coherent laser light.

The wavelength of the emitted light is determined by the semiconductor material used and its composition. Diode lasers can produce light across a wide spectrum, from the ultraviolet to the infrared. Their power output can range from milliwatts for consumer applications to several watts or even kilowatts for industrial uses.

Applications for diode lasers are extensive. They are found in everyday items such as barcode scanners, CD and DVD players, and laser pointers. Industrially, they are used for cutting, welding, and marking materials. In telecommunications, diode lasers are crucial for transmitting data through fiber optic cables. They also play a significant role in medical fields for procedures like surgery and diagnostic imaging, as well as in scientific research. Their versatility and continuous development make them a fundamental component in modern technology.