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The Principles of Lasers: Physics, Components, and Operational Mechanisms
"The principles of lasers describe the process of light amplification by stimulated emission of radiation, wherein photons are generated in a highly coherent, monochromatic, and directional beam. This phenomenon relies on three core requirements: a gain medium, an energy pump, and an optical resonator, which collectively facilitate a cascade of synchronized photon emissions. The Fundamental Physics of Stimulated Emission At the heart of every laser lies the interaction between electromagnetic radiation and matter, specifically described by quantum mechanics. Under normal conditions, electrons in an atom reside in their lowest energy state, kno..."
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