Abstract

With the general n-photon interaction of atoms (molecules) and light, the energy W=inlωinl(withn=nl|nl|) is exchanged, if there is resonance W =ħω0 with a term difference ω0 of the particles. This process provides for gain if an emittive step (any nk < 0) is involved. Aside from single-photon emission, stimulated Raman emission (ω1–ω2 = ω0) is the basis for light sources of unique characteristics.

© 1982 Optical Society of America

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