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Long-term carrier-envelope phase coherence.

Tara M Fortier, David J Jones, Jun Ye

    Optics Letters
    |November 21, 2007
    PubMed
    Summary
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    The carrier-envelope phase of ultrashort laser pulses was stabilized for over 150 seconds. This breakthrough in femtosecond laser technology maintains phase coherence for extended durations.

    Area of Science:

    • * Ultrafast optics and laser physics.
    • * Precision measurement and stabilization techniques.

    Background:

    • * Mode-locked lasers generate ultrashort pulse trains crucial for various scientific applications.
    • * Maintaining carrier-envelope phase (CEP) coherence is vital for applications like frequency metrology and attosecond science.
    • * Previous methods had limitations in the duration of CEP coherence.

    Purpose of the Study:

    • * To stabilize the carrier-envelope phase (CEP) of a 10-fs mode-locked laser pulse train.
    • * To achieve and measure long-term CEP coherence.
    • * To demonstrate the stability independently of the active stabilization loop.

    Main Methods:

    • * Employed a 10-femtosecond (fs) mode-locked laser system.
    • * Implemented a stabilization technique for the carrier-envelope phase.

    Related Experiment Videos

  • * Measured the phase coherence time independently of the feedback control loop.

    • Main Results:

    • * Successfully stabilized the carrier-envelope phase (CEP) of the laser pulse train.
    • * Maintained CEP coherence for a measurement-limited duration of at least 150 seconds.
    • * Demonstrated the robustness of the stabilization by independent measurement.

    Conclusions:

    • * Achieved unprecedented long-term carrier-envelope phase coherence in femtosecond laser pulses.
    • * The stabilization method significantly extends the utility of ultrashort laser pulses.
    • * This advancement has implications for precision measurements and advanced optical science.