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Proceedings Paper

Adaptive optics on petawatt lasers: current performance of the Texas Petawatt Laser
Author(s): Mikael Martinez; Erhard Gaul; Teddy Borger; Frances Aymond; Douglas Hammond; Marty Ringuette; Ramiro Escamilla; Todd Ditmire; John Caird; Al Erlandson; Igor Iovanovic; Chris Ebbers; Bill Molander
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Paper Abstract

In this paper, we report on current developments aimed at improving the focusability of the Texas Petawatt Laser. Two major campaigns have been commissioned that address the issue of focusability. First, we implemented a closed loop, 32 actuator bi-moprh deformable mirror (DFM) to compensate for aberrations in the optical train and second, a color corrector lens assembly was installed that compensates for chromatic errors accumulated in broadband (>15 nm), large aperture (>20 cm) laser systems. We will present in detail, pre and post correction results with the DFM and describe challenges faced when one activates a single shot, high energy closed loop system. Secondly, we will provide modeling and experimental results of our color correction system. This is a novel approach to a problem only seen in high energy, broadband, large aperture laser pulses. By using color correction optics we have demonstrated a 6X increase in focal intensity. With the installation of the DFM, the rms wavefront error in the system was reduced from 2.4 waves to .131 waves, further increasing intensities seen at focus by 1 order of magnitude.

Paper Details

Date Published: 19 February 2011
PDF: 14 pages
Proc. SPIE 7913, Laser Resonators and Beam Control XIII, 79130H (19 February 2011); doi: 10.1117/12.880765
Show Author Affiliations
Mikael Martinez, The Univ. of Texas at Austin (United States)
Erhard Gaul, The Univ. of Texas at Austin (United States)
Teddy Borger, The Univ. of Texas at Austin (United States)
Frances Aymond, The Univ. of Texas at Austin (United States)
Douglas Hammond, The Univ. of Texas at Austin (United States)
Marty Ringuette, The Univ. of Texas at Austin (United States)
Ramiro Escamilla, The Univ. of Texas at Austin (United States)
Todd Ditmire, The Univ. of Texas at Austin (United States)
John Caird, Lawrence Livermore National Lab. (United States)
Al Erlandson, Lawrence Livermore National Lab. (United States)
Igor Iovanovic, Lawrence Livermore National Lab. (United States)
Chris Ebbers, Lawrence Livermore National Lab. (United States)
Bill Molander, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 7913:
Laser Resonators and Beam Control XIII
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko, Editor(s)

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