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Light Amplification by Stimulated Emission of Radiation. A means of creating coherent light by either driving an atomic or molecular transition in an optical cavity or firing a beam of electrons through an undulator.

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Optical Parametric Amplifiers (OPAs) usually have two inputs: a more or less weak seed $\omega_s$ and a more or less strong pump $\omega_s$ where (ideally) each pump photon is converted into a seed ph …
asked Feb 27 '18 by riddleculous