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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 19 — Sep. 10, 2012
  • pp: 20874–20883

Accurate target-plane focal-spot characterization in high-energy laser systems using phase retrieval

B. E. Kruschwitz, S.-W. Bahk, J. Bromage, M. D. Moore, and D. Irwin  »View Author Affiliations


Optics Express, Vol. 20, Issue 19, pp. 20874-20883 (2012)
http://dx.doi.org/10.1364/OE.20.020874


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Abstract

Target-plane intensities on the short-pulse beamlines of OMEGA EP, a petawatt-class laser, are characterized on-shot using the focal-spot diagnostic (FSD), an indirect wavefront-based measurement. Phase-retrieval methods are employed using on-shot and offline camera-based far-field measurements to improve the wavefront measurements and yield more-accurate, repeatable focal-spot predictions. Incorporation of these techniques has improved the mean cross-correlation between the FSD predictions and direct far-field fluence measurements in the target chamber from 0.78 to 0.94.

© 2012 OSA

OCIS Codes
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(140.3295) Lasers and laser optics : Laser beam characterization

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: May 25, 2012
Revised Manuscript: July 25, 2012
Manuscript Accepted: July 27, 2012
Published: August 28, 2012

Citation
B. E. Kruschwitz, S.-W. Bahk, J. Bromage, M. D. Moore, and D. Irwin, "Accurate target-plane focal-spot characterization in high-energy laser systems using phase retrieval," Opt. Express 20, 20874-20883 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-19-20874


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References

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