Measurement of nonlinear index by a relay-imaged top-hat Z-scan technique

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Measurements of the nonlinear index of a number of optical materials of interest for the National Ignition Facility have been performed at 1,064 nm and 355 nm by a modified version of the ``top-hat`` technique and the results compared with the more standard gaussian-beam Z-scan technique. The top-hat technique has the advantages of higher sensitivity and smaller uncertainties introduced by beam-quality considerations. The authors have made what they feel to be an additional improvement by placing the defining aperture for the top hat at the front focal plane of the lens that focuses the beam into the sample and then ... continued below

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15 p.

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Shimada, T.; Kurnit, N.A. & Sheik-Bahae, M. April 1, 1996.

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Description

Measurements of the nonlinear index of a number of optical materials of interest for the National Ignition Facility have been performed at 1,064 nm and 355 nm by a modified version of the ``top-hat`` technique and the results compared with the more standard gaussian-beam Z-scan technique. The top-hat technique has the advantages of higher sensitivity and smaller uncertainties introduced by beam-quality considerations. The authors have made what they feel to be an additional improvement by placing the defining aperture for the top hat at the front focal plane of the lens that focuses the beam into the sample and then reimaging the input aperture with a second lens onto a ccd camera. Reimaging eliminates diffraction fringes and provides a stationary image even for a wedged sample; recording the entire image permits minimization of spurious effects such as varying interference fringes.

Physical Description

15 p.

Notes

INIS; OSTI as DE96008125

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  • 27. annual symposium on optical materials for high power lasers, Boulder, CO (United States), 30 Oct - 1 Nov 1995

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  • Other: DE96008125
  • Report No.: LA-UR--96-992
  • Report No.: CONF-9510106--4
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/212526 | External Link
  • Office of Scientific & Technical Information Report Number: 212526
  • Archival Resource Key: ark:/67531/metadc665076

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • April 1, 1996

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • March 2, 2016, 1:22 p.m.

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Shimada, T.; Kurnit, N.A. & Sheik-Bahae, M. Measurement of nonlinear index by a relay-imaged top-hat Z-scan technique, report, April 1, 1996; New Mexico. (digital.library.unt.edu/ark:/67531/metadc665076/: accessed June 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.