Ultrasound generated by laser in a coated cylinder

An alternative theoretical solution is proposed to predict ultrasound excited by a laser line source in a homogeneous, isotropic cylinder coated with a homogeneous and isotropic material. The spectrum and transient displacement are in agreement to author's previous model for the cylinder without coating. Numerical results are obtained for copper on aluminium and vice versa. It is found for the surface waves that the high frequency component travels faster for hard coatings with velocities faster than that of the substrate, and vice versa for soft coatings.