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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 29, Iss. 30 — Oct. 20, 1990
  • pp: 4447–4452

Absorption in high-Z targets illuminated with 527-nm laser light at high intensity using induced spatial incoherence

John D. Simpson, Robert A. Bosch, B. H. Failor, and E. F. Gabl  »View Author Affiliations


Applied Optics, Vol. 29, Issue 30, pp. 4447-4452 (1990)
http://dx.doi.org/10.1364/AO.29.004447


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Abstract

We have measured 527-nm absorption for induced spatial incoherence (ISI) and non-ISI illumination of high-Z targets over the 0.5–3.5 × 1014-W/cm2 laser intensity range using energy balance with a custom designed 30-cm diam light integrating sphere. Induced spatial incoherence of the laser beam was produced by inserting echelons in the beam path and operating the laser at wide bandwidth (0.2%). To produce ISI and non-ISI data for comparison, we irradiated a large number of 180-μm diam gold disks with 0.5–1.5-ns pulses with echelons in the beam path with and without wide laser bandwidths. Our data show an increase in absorption of 5–11% for the ISI illuminated targets and also suggest a weaker dependence of absorption on laser intensity for ISI illumination than for non-ISI.

© 1990 Optical Society of America

History
Original Manuscript: June 8, 1989
Published: October 20, 1990

Citation
John D. Simpson, Robert A. Bosch, B. H. Failor, and E. F. Gabl, "Absorption in high-Z targets illuminated with 527-nm laser light at high intensity using induced spatial incoherence," Appl. Opt. 29, 4447-4452 (1990)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-29-30-4447


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References

  1. R. H. Lehmberg, S. P. Obenschain, “Use of Induced Spatial Incoherence for Uniform Illumination of Laser Fusion Targets,” Opt. Commun. 46, 27–31 (1983). [CrossRef]
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