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Related Experiment Videos

Reflective diffractive beam splitter for laser interferometers.

Stephan Fahr1, Tina Clausnitzer, Ernst-Bernhard Kley

  • 1Institut für Angewandte Physik, Friedrich-Schiller Universität, Max-Wien Platz 1, 07743 Jena, Germany. stephan.fahr@uni-jena.de

Applied Optics
|August 23, 2007
PubMed
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A novel dielectric diffraction grating beam splitter offers a 50/50 reflection for high-power laser interferometers. This design minimizes thermal lensing and allows flexible substrate choices in applications like gravitational wave detection.

Area of Science:

  • Optics and Photonics
  • Laser Technology
  • Interferometry

Background:

  • High-power laser interferometers require precise beam splitting.
  • Existing beam splitters can suffer from thermal lensing effects.
  • Dielectric diffraction gratings offer potential for advanced optical components.

Purpose of the Study:

  • To realize the first reflective 50/50 beam splitter using a dielectric diffraction grating.
  • To design a beam splitter suitable for high-power laser applications, specifically 1064 nm s-polarized light.
  • To ensure high fabrication tolerances for reliable performance in demanding environments.

Main Methods:

  • Design of a dielectric diffraction grating for a 50/50 reflective beam split.
  • Optimization of groove width and depth to achieve high fabrication tolerances.

Related Experiment Videos

  • Analysis of performance for high-power laser interferometers at 1064 nm.

    • Main Results:

    • Successful realization of a reflective 50/50 dielectric diffraction grating beam splitter.
    • Demonstrated suitability for high-power laser interferometers operating at 1064 nm and s-polarization.
    • Design incorporates high fabrication tolerances to mitigate performance degradation.

    Conclusions:

    • This novel beam splitter overcomes thermal lensing issues in high-power laser interferometers.
    • Enables greater flexibility in substrate material selection for interferometer design.
    • Paves the way for improved performance in next-generation gravitational wave detectors and similar applications.