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Beam diagnostics and feedback method and system for spectrally beam-combined lasers

  • US 8,630,323 B2
  • Filed: 04/02/2013
  • Issued: 01/14/2014
  • Est. Priority Date: 04/12/2010
  • Status: Expired due to Fees
First Claim
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1. An apparatus comprising:

  • a first plurality of lasers, including a first laser and a second laser, wherein each one of the first plurality of lasers generates an optical beam which has a different wavelength that is controllably tunable;

    a first beam combiner that combines the optical beams of the first plurality of lasers into a combined beam that contains each of the different wavelengths from the first plurality of lasers;

    a spectral-to-spatial wavelength-separation device, separate from the first beam combiner, that performs a spectral-to-spatial mapping of the different wavelengths of a portion of the combined beam to a first plurality of distinct spatial locations;

    a detection element that detects optical power at each of the first plurality of distinct spatial locations, and that generates a signal based on the optical power at each of the first plurality of spatial locations; and

    control electronics that maximizes the signal from each of the first plurality of spatial locations by tuning the wavelength of a corresponding one of the plurality of lasers.

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