Abstract
We describe a novel experimental setup that combines the advantages of both laser-induced fluorescence and cavity ring-down techniques. The simultaneous measurement of the ring-down and fluorescence signals from the same sample in a single laser beam delivers the calibration of the fluorescence measurement to gain absolute quantities: absorption cross section, sample density and fluorescence quantum yield. At the same time, the fluorescence measurement extends the dynamic range of a stand-alone cavity ring-down setup from typically three to at least six orders of magnitude. The methodology of this combined cavity-enhanced laser-induced fluorescence (CELIF) technique is developed and rigorously tested against the spectroscopy of 1,4-bis(phenylethynyl)benzene in a molecular beam and density measurements in a cell.
Original language | English |
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Pages (from-to) | 1-24 |
Number of pages | 25 |
Journal | The Journal of Chemical Physics |
Early online date | 8 Aug 2013 |
Publication status | E-pub ahead of print - 8 Aug 2013 |
Keywords
- physics.chem-ph
- physics.optics