Patent ID: 9575325
Date: 2017-02-21
CPC Classifications: G02B,H01S

Claim:
1. A multi-wavelength laser comprising: an array of laser emitters arranged in a two-dimensional pattern, each laser emitter producing an optical beam having a wavelength; a grating stack comprising a plurality of first-order diffraction gratings arranged linearly in a first dimension; a dispersive element; a cylindrical telescope positioned between the grating stack and the array of laser emitters and configured to image the optical beams from the array of laser emitters onto the grating stack; a first cylindrical transform lens positioned approximately a focal length from the array of laser emitters and configured to spatially overlap the optical beams in a second dimension forming a first region of overlap at the grating stack; and a second cylindrical transform lens positioned between the dispersive element and the grating stack and configured to receive the optical beams from the grating stack and to spatially overlap the optical beams in the first dimension forming a second region of overlap at the dispersive element; wherein the dispersive element transmits a multi-wavelength output beam comprising the spatially overlapped optical beams from the array of laser emitters.