Photoacoustic determination of absolute optical absorption coefficient
- 1 March 1977
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 30 (5) , 252-254
- https://doi.org/10.1063/1.89354
Abstract
We propose and demonstrate that the photoacoustic effect can be used for absolute determination of the optical absorption coefficient. The photoacoustic signal is measured as a function of chopping frequency and compared to the theory of the photoacoustic effect. The essential agreement of theory and experiment over a restricted frequency makes possible the determination of the optical absorption coefficient (to within 10% in a test case). Observation of a characteristic leveling off of the photoacoustic signal at low frequencies for several materials is also reported.Keywords
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