A multi-wavelength laser comprising: a plurality of laser emitters, wherein each laser emitter produces optical radiation having a different wavelength; a laser emitter array comprising the plurality of laser emitters wherein the plurality of laser emitters are arranged in a two-dimensional pattern; a multi-wavelength beam comprising a plurality of multi-wavelength row beams, each of the multi-wavelength row beams emanating from the plurality of laser emitters within a laser emitter row; an imaging optics positioned after the laser emitter array and receiving the multi-wavelength beam to generate imaged beams; a first optical transform lens positioned about one focal length from the laser emitter array and receiving the multi-wavelength beam and spatially overlapping the multi-wavelength beam in a first dimension; a first dispersive element having a wavelength dependent dispersion in the first dimension and following the first optical transform lens and receiving the spatially overlapped beams and generating parallel beams in the first dimension; a deflective array following the first dispersive element, wherein the imaging optics are configured to reimage in at least one dimension a scaled image of the optical field near the laser emitter array to a location near the deflective array, the deflective array receiving the parallel beams and generating deflected beams; a second optical transform lens positioned approximately a focal length from the first dispersive element and configured to receive the multi-wavelength beam and to spatially overlap the optical beams in a second dimension forming a second region of overlap at the second dispersive element, the second optical transform lens receiving the deflected beams and generating transformed beams; and a second dispersive element following the second optical transform lens and having wavelength dependent dispersion in a second dimension and configured to receive the transformed beams and transmit a multi-wavelength output beam comprising the a plurality of spatially overlapped optical beams. a plurality of laser emitters, wherein each laser emitter produces optical radiation having a different wavelength; a laser emitter array comprising the plurality of laser emitters wherein the plurality of laser emitters are arranged in a two-dimensional pattern; a multi-wavelength beam comprising a plurality of multi-wavelength row beams, each of the multi-wavelength row beams emanating from the plurality of laser emitters within a laser emitter row; an imaging optics positioned after the laser emitter array and receiving the multi-wavelength beam to generate imaged beams; a first optical transform lens positioned about one focal length from the laser emitter array and receiving the multi-wavelength beam and spatially overlapping the multi-wavelength beam in a first dimension; a first dispersive element having a wavelength dependent dispersion in the first dimension and following the first optical transform lens and receiving the spatially overlapped beams and generating parallel beams in the first dimension; a deflective array following the first dispersive element, wherein the imaging optics are configured to reimage in at least one dimension a scaled image of the optical field near the laser emitter array to a location near the deflective array, the deflective array receiving the parallel beams and generating deflected beams; a second optical transform lens positioned approximately a focal length from the first dispersive element and configured to receive the multi-wavelength beam and to spatially overlap the optical beams in a second dimension forming a second region of overlap at the second dispersive element, the second optical transform lens receiving the deflected beams and generating transformed beams; and a second dispersive element following the second optical transform lens and having wavelength dependent dispersion in a second dimension and configured to receive the transformed beams and transmit a multi-wavelength output beam comprising the a plurality of spatially overlapped optical beams.