The major drawback of high power diode laser systems is their poor beam quality, which can be improved by beam shaping and beam combination. With the high wall-plug efficiency, high power laser diode developed rapidly. Base on bars rated to 60 W and 57% conversion efficiency, vertically stacked arrays (twenty bars) of such configuration are demonstrated with rated to 1183 W. The beam quality of high-power high brightness 880 nm laser diode source is improved with beam shaping. Beam parameter product of 79.3 mm·mrad×81.2 mm·mrad, electro-optical conversion efficiency of more than 45.8% and continuous output power of 1 kW are demonstrated. This laser can be directly applied to cladding, surface hardening and other fields.