laserlähdettä

Laserlähde refers to the component within a laser that generates the laser beam. This core element is responsible for producing the stimulated emission of photons, which is the fundamental process of laser operation. Different types of laser sources exist, each utilizing distinct physical principles to achieve this emission. Common examples include semiconductor lasers, gas lasers, and solid-state lasers. The specific choice of laser source depends on the desired wavelength, power output, beam quality, and application requirements. The laser source is typically pumped by an external energy source, which excites the lasing medium to a higher energy state. When stimulated by a photon of the appropriate energy, the excited atoms or molecules in the medium release photons of the same energy and phase, leading to amplification and the formation of a coherent laser beam. The efficiency and characteristics of the laser output are directly determined by the properties of the laser source and its associated optical cavity.