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METHOD AND APPARATUS FOR SPECTRAL-BEAM COMBINING OF FIBER-AMPLIFIED LASER BEAMS USING HIGH-EFFICIENCY DIELECTRIC DIFFRACTIVE GRATINGS

  • US 20070229939A1
  • Filed: 05/22/2007
  • Published: 10/04/2007
  • Est. Priority Date: 01/26/2005
  • Status: Active Grant
First Claim
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1. A method comprising:

  • providing a plurality of fiber gain media configured to emit laser beams including a first fiber gain medium that emits a first laser beam at a first characteristic wavelength having a full-width half maximum (FWHM) linewidth of at most 1 nm and a second fiber gain medium that emits a second laser beam at a second characteristic wavelength having an FWHM linewidth of at most 1 nm;

    providing one or more high-efficiency dielectric diffractive gratings optically coupled to receive the first and second laser beams; and

    spectrally combining the first and second laser beams into a single output beam using the one or more high-efficiency dielectric diffractive gratings.

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