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Spectrally beam combined laser system and method at eye-safer wavelengths

  • US 8,441,718 B2
  • Filed: 11/23/2009
  • Issued: 05/14/2013
  • Est. Priority Date: 11/23/2009
  • Status: Active Grant
First Claim
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1. A method comprising:

  • providing a plurality of Raman optical fibers including a first optical fiber and a second optical fiber;

    providing a plurality of intermediate-wavelength grating pairs, wherein each intermediate-wavelength grating pair of the plurality of intermediate-wavelength grating pairs is configured to resonate at one or more of a plurality of different intermediate Raman-shifted wavelengths;

    providing at least a first common grating;

    optically coupling the first common grating to both the first optical fiber and the second optical fiber;

    generating a plurality of different output wavelengths of laser light, wherein the plurality of different output wavelengths includes a first output wavelength and a second output wavelength;

    successively Raman shifting a base-wavelength Raman pump light in each one of the plurality of optical fibers to each successive one of the plurality of different intermediate Raman-shifted wavelengths;

    Raman amplifying, in each of the plurality of optical fibers, the plurality of different output wavelengths, each of which is longer than 1300 nm; and

    spectral-beam combining the plurality of Raman amplified wavelengths into a single output beam.

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