A calibration technique for frequency domain ...
|Title||A calibration technique for frequency domain photothermoacoustics|
|Author(s)||G. Spirou, A. Mandelis, I. Vitkin, W. Whelan|
|Journal||European Physical Journal-Special Topics|
|Abstract||Photoacoustic (or more precisely, photothermoacoustic) signals are generated by the absorption of photons, expressed as acoustic waves, and can be related to the incident laser fluence rate. Here a calibration procedure for frequency domain (FD) photoacoustics is presented which utilizes the relationship between photoacoustic (PA) signal amplitude and laser fluence rate. The sample is irradiated with a continuous wave laser which is amplitude modulated at varying frequencies. Applying the calibration procedure to the PA detected signals, a linear relationship is obtained between the fluence rate and the signal amplitude.|
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