Abstarct: The study of optical and transport properties of nano scale structures and devices under tunable high power THz laser sources, such as free-electron lasers has been possible due to the development in technology. In order to achieve a deep understanding of the results of these experimental studies and to develop the applications, comprehensive theoretical investigations on these systems is inevitable. In this research, non-linear transport and optical properties of a quasi-two-dimensional semiconductor quantum well wire under laser radiation is being Studied. First, by solving the momentum and energy balance equations through the steady stare Boltzmann equation approach and Considering the interaction between electrons and phonons, we obtain momentum relaxation time, conductivity and electron energy loss rate for quasi-two-dimensional quantum wire. Then using the results, we have investigated the dependence of electronic transition rate, electron temperature, conductivity and electron energy loss rate on the intensity and frequency of electromagnetic radiation field and on the sample temperature in AlGaAs /GaAs heterojunctions numerically.