  In this paper we show how to control the quantum laser atoms instability
using IR radiation. The control can be achieved by controlling the scattering
length constant via the infrared coupling constant. This method is applied in
the scheme of a continuous CW laser and involves three occupation levels in the
condensed atoms.This atoms in Lambda configuration the description of which is
given by a Reformed Gross-Pitaevskii equation (RGPE), together with a rate
equation.The system is taken to a nonconservative complex Ginzburg Landau
equation (CGLE) description from where we use the Benjamin-Feir stability
criterium.This method allows us a theoretical construction of any atom laser
even for negative interaction constant as is the case of $^{7}Li$.
