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Highly versatile, two-color setup for high-order harmonic generation using spatial light modulators.

A-K Raab1, M Schmoll2, E R Simpson1

  • 1Department of Physics, Lund University, P.O. Box 118, 22100 Lund, Sweden.

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Summary
This summary is machine-generated.

We developed a new two-color high-order harmonic generation setup using a femtosecond laser. This system allows precise control over laser parameters for advanced studies in ultrafast science.

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Area of Science:

  • Physics
  • Ultrafast Science
  • Nonlinear Optics

Background:

  • High-order harmonic generation (HHG) is a key process for producing extreme ultraviolet (XUV) and soft X-ray radiation.
  • Two-color HHG, utilizing fundamental and second harmonic laser fields, offers enhanced control over the generated harmonic spectra.
  • Precise control over the relative spatio-temporal properties of the two colors is crucial for optimizing HHG yields and spectral characteristics.

Purpose of the Study:

  • To present a novel, highly controllable, interferometric two-color high-order harmonic generation (HHG) setup.
  • To enable automated, multi-parameter scans for optimizing HHG processes.
  • To provide real-time feedback for experimental stability and control.

Main Methods:

  • Utilizing a turn-key Ytterbium-doped femtosecond laser and its second harmonic.
  • Employing an interferometric design with spatial light modulators (SLMs) in each arm.
  • Implementing independent control over relative delay, power, and focusing geometries of the two color beams.
  • Integrating a live diagnostics system for continuous monitoring.

Main Results:

  • Demonstration of a stable and versatile two-color HHG apparatus.
  • Capability for precise manipulation of spatial beam profiles and temporal delay.
  • Facilitation of automated scans for optimizing HHG parameters.
  • Real-time monitoring ensures experimental stability and reproducibility.

Conclusions:

  • The developed setup offers unprecedented control for two-color HHG experiments.
  • This platform is suitable for advanced investigations in ultrafast science and attosecond physics.
  • The automated scanning and live diagnostics pave the way for efficient experimental optimization and discovery.