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Related Experiment Videos

Carrier envelope phase noise in stabilized amplifier systems.

Christoph Gohle1, Jens Rauschenberger, Takao Fuji

  • 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, D-85748 Garching, Germany. ctg@mpq.mpg.de

Optics Letters
|October 4, 2005
PubMed
Summary

Most high-energy laser systems use chirped pulse amplification. This study examines how pulse selection impacts carrier envelope phase stability and estimates phase noise in amplified laser pulses. Noise above the picking frequency is aliased and significant.

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Area of Science:

  • Laser physics
  • Ultrafast optics

Background:

  • Chirped pulse amplification (CPA) systems are standard for generating phase-stabilized high-energy laser pulses.
  • These systems rely on selecting and amplifying pulses from a phase-stabilized seed oscillator.

Purpose of the Study:

  • To investigate the impact of the pulse picking process on carrier envelope phase stability.
  • To determine how to estimate phase noise in picked pulse sequences based on seed oscillator properties.

Main Methods:

  • Analysis of noise components in the seed oscillator's pulse train.
  • Investigation of aliasing effects introduced by the pulse picking frequency.

Main Results:

  • The pulse picking process significantly affects carrier envelope phase stability.

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  • Noise components from the original pulse train above the picking frequency are aliased into the picked pulse train.
  • Phase noise of the picked pulse sequence can be estimated from the seed oscillator's phase noise properties.

    • Conclusions:

    • The pulse picking process is a critical factor influencing phase stability in high-energy laser systems.
    • Aliasing of higher-frequency noise components cannot be neglected in CPA systems.
    • Accurate estimation of phase noise requires considering the seed oscillator's noise characteristics.