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FAQ series: This series of publications explores some of the most frequently asked questions regarding Timegated® spectrometers and measurements without having you read page after page of text.
Some surface analytical techniques are based on altering (e.g. ablation) sample surfaces. Other techniques, like Raman spectroscopy, usually aim to keep sample surfaces intact during a measurement as surface alteration might affect the results.
Using high excitation laser power may enable effective collection of Raman information in a relative short measurement but it is important to check if the measured material can withstand the laser exposure as laser sensitivity varies significantly depending on the sample type. Next, we are going to look at some of the more common methods of minimizing any possible sample alteration due to laser exposure.