| Автор | J Howard |
| Автор | N J Everall |
| Автор | R W Jackson |
| Автор | K Hutchinson |
| Дата выпуска | 1986-11-01 |
| dc.description | The application of a picosecond-pulsed laser system, in conjunction with a time-to-amplitude converter, to the suppression of fluorescence noise in Raman spectra is described. Enhancements of 14.6 (Raman signal/fluorescence background) and 2.8 (Raman signal/fluorescence noise) were obtained for a solution of benzene doped with a fluorophore with lifetime tau <sub>f</sub>=11.8 ns, while corresponding improvements of 5.5 and 2.0 were observed for a dopant with tau <sub>f</sub>=3.9 ns. When the samples studied exhibited non-Poisson fluctuations in background intensity, the signal-to-noise enhancement was much greater (7.2). Calculations are presented which successfully model the signal-to-noise enhancement as a function of tau <sub>f</sub> and the detector timing resolution. These calculations have been verified experimentally over a wide range of gate widths and positions. The importance of the Raman signal/fluorescence noise ratio rather than the Raman signal/fluorescence background level is stressed. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Fluorescence rejection in Raman spectroscopy using a synchronously pumped, cavity-dumped dye laser and gated photon counting |
| Тип | paper |
| DOI | 10.1088/0022-3735/19/11/013 |
| Print ISSN | 0022-3735 |
| Журнал | Journal of Physics E: Scientific Instruments |
| Том | 19 |
| Первая страница | 934 |
| Последняя страница | 943 |
| Аффилиация | J Howard; ICI, Wilton, Middlesbrough, UK |
| Аффилиация | N J Everall; ICI, Wilton, Middlesbrough, UK |
| Аффилиация | R W Jackson; ICI, Wilton, Middlesbrough, UK |
| Аффилиация | K Hutchinson; ICI, Wilton, Middlesbrough, UK |
| Выпуск | 11 |
