Patent ID: 7804881

Claim:
A laser system for generating an output beam, the laser system comprising: a laser assembly for emitting a primary laser beam, the laser assembly comprising a plurality of emitters for emitting respective primary beam contributions to the emitted primary laser beam; first and second light feedback devices forming respective external cavities with the laser assembly for reflecting to the laser assembly respective feedback portions of the light produced by the laser assembly; a dispersive device positioned to receive light from the laser assembly and to redirect respective portions of the received light to the first and second feedback devices as corresponding first and second redirected beams, wherein the first feedback device is adapted to reflect a feedback portion of the first redirected beam back onto the dispersive device and to generate the output beam from an output part of the first redirected beam; an imaging device for generating an optical Fourier transform of the plurality of emitters at a Fourier plane and to form a combined intensity distribution pattern having multiple lobes positioned off-axis relative to a principal axis of the laser assembly which projects out of an output face thereof; wherein the dispersive device is positioned displaced from said Fourier plane by a predetermined displacement in a direction along said principle axis; the displacement being defined as a distance between respective intersections of the principle axis with an entrance surface of the dispersive device and with the Fourier plane.