Spectral narrowing,wavelength stabilizing and beam shaping of a wide aperture diode laser array was achieved with a volume Bragg grating and a step-mirror.At an operating current of 15 A,the spectrum was narrowed from 3.0 nm to 0.23 nm without significant broadening when increasing the injection current. The emission wavelength was stabilized at 807.7 nm and didnot change with the temperature of the cooler.By shaping with the step-mirror and focusing the beam,it can be coupled into an optical fiber with a diameter of 600 μm and a numerical aperture of 0.22.The coupling efficiency is 88.6%.The narrowed and shaped beam can be used in end pumped lasers with narrow absorption bandwidth.