A technology that is useful for creating high-intensity, coherent, unidirectional light.
It works like this: Atoms of a particular material are excited (given energy) by various means (usually by applying a current); when more atoms in this material are 'excited' than 'stable' a light beam is passed through the material which causes the 'excited' atoms to revert back to their 'stable' state (sometimes in stages); this stimulates the emission of additional light; the process is repeated until the light beam is amplified to the desired energy, at which stage it leaves the system.
To understand how a laser works you need to learn quantum mechanics and atomic and nuclear physics.
Prices shown in USD.
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