Acoustic-based measurements of material absorption coefficients: Relationship between laser pulse duration and stress confinement time
- Author(s): Choi, Bernard
- Jansen, E Duco
- Welch, Ashley J
- et al.
Published Web Locationhttps://doi.org/10.1063/1.1627464
The relationship between laser pulse duration (τ p) and stress confinement time (τ sr) was studied using acoustic-based measurements of material absorption coefficient (μ a). A numerical model was developed to simulate stress signals. Experimental photoacoustic measurements at several values of τ were performed to estimate μ a of water. A numerical deconvolution technique was implemented to overcome the limitation of conventional photoacoustics, resulting in up to a 30% improvement in photoacoustic-based estimates of the sample μ a.