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Related Experiment Video

Updated: Jun 6, 2026

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

Cr : YAG chirped-pulse oscillator.

Evgeni Sorokin1, Vladimir L Kalashnikov, Julien Mandon

  • 1Institut für Photonik, TU Wien, Gusshausstr. 27/387, A-1040 Vienna, Austria.

New Journal of Physics
|December 15, 2010
PubMed
Summary

Chirped-pulse operation in Cr:YAG lasers boosts output energy fivefold by shifting to positive dispersion. This stable regime enables compressible ultrashort pulses for supercontinuum generation.

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Area of Science:

  • Laser physics
  • Nonlinear optics

Background:

  • Passively mode-locked lasers are crucial for generating ultrashort pulses.
  • Understanding laser operation regimes, especially near zero dispersion, is key to optimizing performance.
  • Cr:YAG lasers offer potential for tunable ultrashort pulse generation.

Purpose of the Study:

  • To demonstrate and investigate chirped-pulse operation in a Cr:YAG passively mode-locked laser.
  • To explore different laser operation regimes experimentally and numerically.
  • To identify conditions for enhanced output pulse energy and stable operation.

Main Methods:

  • Experimental investigation of laser operation regimes.
  • Numerical modeling of laser dynamics.
  • Characterization of output pulse properties (duration, energy, compressibility).
  • Supercontinuum generation in nonlinear fiber.

Main Results:

  • A five-fold increase in output pulse energy was achieved by transitioning to the positive dispersion regime.
  • Output pulses of 1.4 ps duration were compressed to 120 fs.
  • Chirped-pulse operation stability depends significantly on intracavity dispersion.
  • A minimum positive dispersion threshold for stable chirped-pulse operation was predicted and confirmed.

Conclusions:

  • Chirped-pulse operation in Cr:YAG lasers significantly enhances output pulse energy.
  • The identified chirped-pulse regime is stable and suitable for applications like supercontinuum generation.
  • Intracavity dispersion management is critical for optimizing laser performance and stability.