Population inversion in fluorescing fragments of super-excited molecules inside an air filament
Population inversion in fluorescing fragments of super-excited molecules inside an air filament |
| Fig.#cod#x0A0;2. Scan of fluorescence spectra from pure air black and air contaminated by 2% C 2 H 2 red. Two CH bands are indicated. We select the CH band around 429#cod#x2013;432#cod#x0A0;nm and measure the gain ASE. [ 4 ] |
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