Pulse propagation and windowed wave functions

摘要

We apply quasi-distribution methods developed for quantum mechanics to the propagation of pulses in dispersive media with attenuation.We show that a Schr?dinger type equation follows for propagation of the pulse for each mode. One then transforms the equation to obtain an equation of evolution in the phase space of position and wavenumber. In this paper we emphasize windowed wave functions and their corresponding phase space quasi-distributions. We obtain the time evolution equation, discuss possible approximations, and compare to the Wigner distribution approximation previously derived by Loughlin and Cohen by different methods.