Improved beam smoothing with SSD using generalized phase modulation

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The smoothing of the spatial illumination of an inertial confinement fusion target is examined by its spatial frequency content. It is found that the smoothing by spectral dispersion method, although efficient for glass lasers, can yield poor smoothing at low spatial frequency. The dependence of the smoothed spatial spectrum on the characteristics of phase modulation and dispersion is examined for both sinusoidal and more general phase modulation. It is shown that smoothing with non-sinusoidal phase modulation can result in spatial spectra which are substantially identical to that obtained with the induced spatial incoherence or similar method where random phase plates ... continued below

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15 p.

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Rothenberg, J.E. January 1, 1997.

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Description

The smoothing of the spatial illumination of an inertial confinement fusion target is examined by its spatial frequency content. It is found that the smoothing by spectral dispersion method, although efficient for glass lasers, can yield poor smoothing at low spatial frequency. The dependence of the smoothed spatial spectrum on the characteristics of phase modulation and dispersion is examined for both sinusoidal and more general phase modulation. It is shown that smoothing with non-sinusoidal phase modulation can result in spatial spectra which are substantially identical to that obtained with the induced spatial incoherence or similar method where random phase plates are present in both methods and identical beam divergence is assumed.

Physical Description

15 p.

Notes

INIS; OSTI as DE97051810

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  • 2. annual solid state lasers for applications to inertial confinement fusion (ICF), Paris (France), 22-25 Oct 1996

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  • Other: DE97051810
  • Report No.: UCRL-JC--124508
  • Report No.: CONF-9610225--19
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 462900
  • Archival Resource Key: ark:/67531/metadc682693

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  • January 1, 1997

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  • July 25, 2015, 2:21 a.m.

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  • Feb. 18, 2016, 5:31 p.m.

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Rothenberg, J.E. Improved beam smoothing with SSD using generalized phase modulation, article, January 1, 1997; California. (digital.library.unt.edu/ark:/67531/metadc682693/: accessed September 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.