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

Ayman Alismail1, Haochuan Wang2, Jonathan Brons3

  • 1Department of Physics, Ludwig Maximilian University of Munich; Physics and Astronomy Department, King Saud University.

Journal of Visualized Experiments : Jove
|July 27, 2017
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Summary

This study details a high-power Yb:YAG thin-disk regenerative amplifier, achieving 100 W average power. This stable, turn-key system is ideal for pumping optical parametric chirped-pulse amplifiers (OPCPAs).

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Area of Science:

  • Laser Physics
  • Nonlinear Optics
  • Materials Science

Background:

  • High-power ultrafast lasers are crucial for various scientific applications.
  • Yb:YAG thin-disk lasers offer excellent thermal management and scalability.
  • Regenerative amplifiers based on chirped-pulse amplification (CPA) are essential for generating high-energy ultrashort pulses.

Purpose of the Study:

  • To report on the development and performance of a 100 W, 5 kHz Yb:YAG thin-disk regenerative amplifier.
  • To demonstrate its suitability as a pump source for optical parametric chirped-pulse amplification (OPCPA).
  • To provide a guide for setting up and operating such a system.

Main Methods:

  • Utilizing a homemade Yb:YAG thin-disk Kerr-lens mode-locked oscillator to seed a regenerative chirped-pulse amplifier.
  • Operating the amplifier in airtight housing at room temperature with a 5 kHz repetition rate.
  • Employing a beta barium borate crystal for frequency doubling to 515 nm.

Main Results:

  • Achieved 100 W average power and 20 mJ pulse energy at 1 ps pulse duration.
  • Demonstrated stable operation with pulse-to-pulse stability less than 1%.
  • Obtained 70 W average power at 515 nm after frequency doubling, corresponding to 70% optical-to-optical efficiency.

Conclusions:

  • The developed Yb:YAG thin-disk regenerative amplifier provides a stable, high-power, and efficient laser source.
  • Its performance makes it an attractive pump source for near-infrared and mid-infrared OPCPA systems.
  • Using a single laser source for both seed and pump in OPCPA eliminates the need for active temporal synchronization.