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Mode-locked pulsed laser system and method

  • US 20040017833A1
  • Filed: 09/27/2002
  • Published: 01/29/2004
  • Est. Priority Date: 03/30/2000
  • Status: Active Grant
First Claim
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1. A method of stabilizing the phase of a carrier wave signal with respect to an envelope of the pulses emitted by a mode-locked pulsed laser comprising:

  • obtaining an optical output from said pulsed laser that has a bandwidth that spans at least one octave;

    separating a first frequency output from said optical output having a first frequency;

    separating a second frequency output from said optical output, said second frequency output having a second frequency that is twice the frequency of said first frequency;

    frequency doubling said-first frequency output of said pulsed laser to produce a frequency doubled first output;

    frequency shifting said second frequency output by a predetermined amount to produce a second frequency shifted output;

    combining said frequency doubled first output and said second frequency shifted output to obtain a beat frequency signal;

    detecting said beat frequency signal;

    using said beat frequency signal to phase coherently stabilize said phase of said carrier wave signal relative to said envelope of said pulsed laser.

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