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1 May 1992 Proton-transfer laser
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The advantages of the four-level laser are described, especially the maintenance of an exceptionally high population inversion because the ground final state is maintained at zero population. The intrinSiC intramoleCular excited-state proton-transfer fluorescence is described as conforming to the four-level laser requirement. Examples are presented which function efficiently, with amplified spontaneous emission gain factors in the range 12 —14 vs. normal laser dye gain factors in the range 7 —9. The specific paradox is described of cases having good proton-transfer fluorescence and no laser potentiaL The spectroscopic criteria necessary are indicated. The extension of the present studies of flavonol proton-transfer cases to one-ring and multi-ring aromatics promises to yield powerful CW lasers from the UV to the JR range.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Michael Kasha "Proton-transfer laser", Proc. SPIE 1637, Environmental and Process Monitoring Technologies, (1 May 1992);

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