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Double-angle multilayer mirrors with smooth dispersion characteristics.

V Pervak1, I Ahmad, M K Trubetskov

  • 1Ludwig-Maximilians-Universitaet Muenchen, Garching, Germany. volodymyr.pervak@mpq.mpg.de

Optics Express
|May 13, 2009
PubMed
Summary

Precision dispersion control is achieved using novel multilayer mirrors manufactured in a single run. These "double-angle" mirrors significantly reduce spectral oscillations for enhanced femtosecond pulse compression.

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Ultrafast Science

Background:

  • Broadband dispersion control is crucial for ultrafast optics.
  • Multilayer mirrors are commonly used for dispersion management.
  • Existing methods often suffer from spectral oscillations and manufacturing complexities.

Purpose of the Study:

  • To demonstrate precise broadband dispersion control using a novel multilayer mirror design.
  • To suppress inherent group-delay dispersion (GDD) fluctuations.
  • To improve the manufacturing yield and quality of dispersion control components.

Main Methods:

  • Designed multilayer structures using a specialized needle optimization algorithm.
  • Fabricated mirrors for operation at two different angles of incidence in a single coating run.

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  • Characterized the dispersion performance of the fabricated mirrors.

    • Main Results:

    • Achieved broadband dispersion control with suppressed spectral oscillations.
    • Demonstrated improved robustness to layer thickness errors compared to previous methods.
    • Successfully compressed femtosecond pulses to a duration of 4.3 fs using the developed mirrors.

    Conclusions:

    • The developed "double-angle" multilayer mirrors offer a feasible and robust solution for precision broadband dispersion control.
    • This approach enhances the quality and production yield for femtosecond dispersion management.
    • The technique enables significant advancements in ultrafast laser systems.