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Direct ultrashort laser system

  • US 8,311,069 B2
  • Filed: 12/19/2008
  • Issued: 11/13/2012
  • Est. Priority Date: 12/21/2007
  • Status: Active Grant
First Claim
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1. A method of using a laser system, the method comprising:

  • (a) emitting at least one laser beam pulse;

    (b) introducing reference phases in the at least one pulse;

    (c) detecting harmonic frequency intensities of the at least one pulse;

    (d) determining a matrix of the detected harmonic frequency intensities versus the reference phases;

    (e) determining a maximum intensity in the matrix for each frequency of the at least one pulse;

    (f) assigning a value corresponding to each maximum intensity;

    (g) determining a second derivative of a spectral phase from the maximum intensity values for each frequency;

    (h) calculating a double integral with respect to frequency in order to obtain a spectral phase function of distortions in the at least one pulse;

    (i) canceling the distortion in the at least one pulse by introducing a negative value of that calculated in step (h); and

    (j) introducing the negative value to cancel distortion using a non-programmable optic including at least one of;

    (a) a deformable mirror, (b) a chirped mirror, and (c) a grating.

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