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Two-dimensional laser system employing two dispersive elements

  • US 9,147,990 B2
  • Filed: 02/07/2013
  • Issued: 09/29/2015
  • Est. Priority Date: 02/07/2012
  • Status: Active Grant
First Claim
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1. A multi-wavelength laser device comprising:

  • a plurality of laser emitters (14), wherein each laser emitter (14) produces optical radiation having a different wavelength;

    a laser emitter array (10) comprising the plurality of laser emitters (14) wherein the plurality of laser emitters (14) are arranged in a two-dimensional pattern;

    a multi-wavelength beam (27) comprising a plurality of multi-wavelength row beams (29), each of the multi-wavelength row beams (29) emanating from the plurality of laser emitters (14) within a laser emitter row (12);

    an imaging optics (24) positioned after the laser emitter array (10) and receiving the multi-wavelength beam (27) to generate imaged beams;

    a first optical transform lens (16) positioned about one focal length from the laser emitter array (10) and receiving the multi-wavelength beam (27) and spatially overlapping the multi-wavelength beam (27) in a first dimension;

    a first dispersive element (18) having a wavelength dependent dispersion in the first dimension and following the first optical transform lens (16) and receiving the spatially overlapped beams and generating parallel beams in the first dimension;

    a deflective array (26) following the first dispersive element (18), wherein the imaging optics (24) are configured to reimage in at least one dimension a scaled image of the optical field near the laser emitter array (10) to a location near the deflective array (26), the deflective array (26) receiving the parallel beams and generating deflected beams in a first dimension;

    a second optical transform lens (20) positioned approximately a focal length from the first dispersive element (18) and configured to receive the multi-wavelength beam (27) and to spatially overlap the optical beams in a second dimension forming a second region of overlap at the second dispersive element (22), the second optical transform lens (20) receiving the deflected beams and generating transformed beams; and

    a second dispersive element (22) following the second optical transform lens 28 (20) and having wavelength dependent dispersion in a second dimension and configured to receive the transformed beams and transmit a multi-wavelength output beam (28) comprising the a plurality of spatially overlapped optical beams; and

    the first and second dimensions are orthogonal such that the deflective array (26) generates deflected beams by deflecting the beams in a plane orthogonal to a plane of dispersion of the second dispersive element (22).

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