Raman Spectroscopy of Iranian Region Calcite Using Pulsed Laser : An Approach of Fluorescence Suppression by Time-Gating Method

The effect of time-gating method in Raman spectroscopy for fluorescence suppression of Iranian region calcite is investigated. Experiments are done using an Nd:YAG laser with a pulse durations of 10 ns at wavelength 532 nm. Seven samples from different places are examined. In order to obtain the opt...

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Bibliographic Details
Published in:Journal of spectroscopy (Hindawi) 2013-01, Vol.2013 (2013), p.1-6
Main Authors: Soleimaninejad, H., Tavassoli, S. H., Matroodi, F.
Format: Article
Language:English
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Summary:The effect of time-gating method in Raman spectroscopy for fluorescence suppression of Iranian region calcite is investigated. Experiments are done using an Nd:YAG laser with a pulse durations of 10 ns at wavelength 532 nm. Seven samples from different places are examined. In order to obtain the optimum gate width for fluorescence suppression, a series of experiments is carried out at different gate widths. Raman-to-fluorescence (R/F) and fluorescence-to-laser peak (F/L) ratios are compared at gated and nongated experiments. Applying the optimum gate width leads to an effective reduction of fluorescence background and improvement in both ratios of R/F and F/L. Raman signals of some samples in nongated experiments are completely hidden by fluorescence while emerged in gated experiments.
ISSN:2314-4920
2314-4939
DOI:10.1155/2013/254964