Laser devices are tools that emit focused beams of light through a process called stimulated emission. They are used in various applications, including medical procedures, telecommunications, and manufacturing. The light produced by lasers is highly concentrated and can be precisely controlled, making them effective for cutting, engraving, and even performing delicate surgeries. There are different types of laser devices, such as diode lasers, fiber lasers, and CO2 lasers, each designed for specific tasks. In medicine, lasers can treat skin conditions or assist in surgeries, while in industry, they are used for welding and marking materials. Their versatility makes them essential in modern technology.