In this work, we present analytical and finite element method (FEM) modeling to describe the time dependence of the pyroelectric current of embedded piezoelectrics generated by a laser pulse. Analytical solutions of the one-dimensional heat transfer equation consider a two-layer model, account for the experimentally derived heat pulse shape and the heat loss to the environment. They serve as a proof of the more complex FEM modeling which allows the consideration of three-layer models. It provides an understanding of the heat transfer in structurally complex devices excited by laser pulses.