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Polarized light interferometer for laser fusion studies.

R Benattar1, C Popovics, R Sigel

  • 1Greco Interaction Laser Matiere, Ecole Polytechnique, 91128 Palaiseau Cedex, France.

The Review of Scientific Instruments
|December 1, 1979
PubMed
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A novel polarized light interferometer simplifies high-speed imaging for laser fusion experiments. This robust design offers excellent stability and a wide spectral range, proving effective in plasma interaction studies.

Area of Science:

  • Optics and Photonics
  • Plasma Physics
  • Laser Technology

Background:

  • High-speed imaging is crucial for understanding complex phenomena in laser fusion.
  • Existing interferometry techniques can face challenges with alignment, stability, and spectral range.
  • Microscopic object visualization in dynamic plasma environments requires specialized instrumentation.

Purpose of the Study:

  • To describe a new polarized light interferometer for high-speed photography.
  • To highlight the advantages of this interferometer, including simplicity, stability, and broad spectral coverage.
  • To demonstrate its application in laser-driven plasma interaction studies.

Main Methods:

  • Development of a polarized light interferometer utilizing a Wollaston prism as a beam splitter.

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  • Testing the interferometer's performance with microscopic objects in laser fusion experimental setups.
  • Application of the interferometer for studying carbon dioxide (CO2) and neodymium laser plasma interactions.

    • Main Results:

    • The interferometer demonstrates relative simplicity and inherent stability, eliminating alignment issues.
    • It offers an extended spectral range, functioning down to 0.18 micrometer wavelengths.
    • Successful application in laser plasma interaction studies using ruby laser (0.694 mum) and fourth-harmonic neodymium laser (0.265 mum) illumination.

    Conclusions:

    • The described polarized light interferometer is a suitable tool for high-speed microscopic imaging in laser fusion.
    • Its design advantages make it a practical and versatile instrument for plasma physics research.
    • The interferometer's performance validates its utility across different laser wavelengths and plasma conditions.