Laser systems are devices that produce focused beams of light through a process called stimulated emission. They work by exciting atoms or molecules in a medium, such as gas, liquid, or solid, which then emit photons. These photons are amplified and emitted as a coherent beam of light, characterized by its monochromaticity and directionality. Laser systems have a wide range of applications, including in medical procedures, communication technologies, and manufacturing processes. They are used for tasks such as cutting, welding, and precision measurements. The versatility and efficiency of laser systems make them essential tools in various industries.