The evolution of laser technology is one of the most significant events in modern science. Beginning in 1960, laser technology has advanced from an elementary form of maser technology to the highly complex output power laser system. The purpose of this research is to determine the dependence of the output power laser on temperature, gas mixture pressures, input power and the brewster angle. In addition, the researcher calculated the molecular properties of CO2. The researcher established procedures to measure the changes of gas mixture pressures, input power and brewster angle. In addition, the researcher examined the temperature as a function of gas mixture pressure, output power as a function of temperature, gas mixture pressure, input power and the brewster angle. In order to calculate the molecular properties of CO2, the researcher used CNDO and MOPAC.