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Applied Optics

Applied Optics


  • Vol. 22, Iss. 9 — May. 1, 1983
  • pp: 1318–1324

Transportation of far-IR beams for use in plasma diagnostics

M. R. Siegrist, I. Kjelberg, and R. Behn  »View Author Affiliations

Applied Optics, Vol. 22, Issue 9, pp. 1318-1324 (1983)

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In this paper we discuss certain aspects concerning the transport and focusing of a high power far-IR laser beam into a plasma for Thomson scattering measurements. To attain the required megawatt power level in a D2O laser, it is important to use efficiently the volume of the optically pumped vapor. The best known method to achieve this is use of an unstable resonator which produces a beam with an annular intensity profile. This has a negative effect on the quality of the focused beam and on the intensity profile incident on the beam dump. A system utilizing a Cassegrainian telescope and spatial filtering techniques is found to be a good solution.

© 1983 Optical Society of America

Original Manuscript: November 17, 1983
Published: May 1, 1983

M. R. Siegrist, I. Kjelberg, and R. Behn, "Transportation of far-IR beams for use in plasma diagnostics," Appl. Opt. 22, 1318-1324 (1983)

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  1. A. E. Siegman, Appl. Opt. 13, 353 (1974). [CrossRef] [PubMed]
  2. M. R. Siegrist, M. R. Green, P. D. Morgan, R. L. Watterson, Appl. Opt. 19, 3824 (1980). [CrossRef] [PubMed]
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