By using the manner of the energy transferring from excited DF(v) to CO2(0000), CO2 spectral lines of 10P20(944.27 cm-1) and 10P12(955.26 cm-1) have been observed on the CO2 gain module of the dual-band laser. Research is focused on flux controlling, fuels injecting methods, optimized position of the optical axis, power stability and beam profile. The max power of the DF-CO2 laser is 2.3 W, and the cavity pressure of this laser is about 2 kPa.