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High-performance deep-ultraviolet optics for free-electron lasers.

Alexandre Gatto1, Roland Thielsch, Joerg Heber

  • 1Fraunhofer Institut für Angewandte Optik und Feinmechanik, Jena, Germany. gatto@iof.fhg.de

Applied Optics
|June 18, 2002
PubMed
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Researchers developed specialized optics and coatings for deep-ultraviolet free-electron lasers, achieving record short wavelengths and high power. This advancement enables new possibilities for scientific research using these powerful light sources.

Area of Science:

  • Optics and Photonics
  • Laser Physics
  • Materials Science

Background:

  • Developing optics for wavelengths shorter than deep ultraviolet (DUV) requires specialized techniques.
  • High-performance DUV optics, including dielectric mirrors, are crucial for free-electron lasers (FELs) operating in harsh synchrotron environments.
  • Dedicated coating methods and characterizations are essential for these advanced optical components.

Purpose of the Study:

  • To report on the research and development of coatings for DUV optics used in free-electron lasers.
  • To correlate coating performance with lasing characteristics at short wavelengths.
  • To showcase advancements in DUV optics for FEL applications.

Main Methods:

  • Development of dedicated coating techniques for DUV dielectric mirrors.

Related Experiment Videos

  • Characterization of optical coatings for low loss and high reflectivity.
  • Testing and optimization of transmission mirrors for FEL oscillators.
  • Measurement of lasing performance, including wavelength and extracted power.

    • Main Results:

    • Achieved lasing at 189.7 nm, the shortest wavelength reported for FEL oscillators at the time.
    • Measured 330 mW of extracted power at 250 nm using optimized transmission mirrors.
    • Demonstrated long lifetimes for dielectric mirrors in synchrotron radiation environments.

    Conclusions:

    • Specialized optics and coating techniques are critical for advancing FEL capabilities at short DUV wavelengths.
    • The developed optics and coatings enable high performance and durability in demanding FEL applications.
    • These advancements pave the way for future research utilizing FELs at unprecedentedly short wavelengths.