GaSb-based diode lasers with emitting wavelength of 1.8 ~ 4 μm have a wide range of applications due to advantages of compact in size, light in weight and electric drive. However, single emitter can not provide enough laser power for practical applications. Therefore, methods of beam combination which have been successfully applied to diode lasers in near-infrared band are needed to be transplanted to mid-infrared band. In every method of beam combination, high efficiency beam shaping is basic and principal. A method of high efficiency beam shaping using multiple single diode lasers was demonstrated. A continuous-wave optical power of 1.93 W at wavelength of 1.94 μm with efficiency of higher than 90% was achieved experimentally. This method of beam shaping can be utilized to build spectral or coherent beam combination.