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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 19 — Jul. 1, 2009
  • pp: 3691–3694

Beam wavefront control of a thermal inertia laser for inertial confinement fusion application

Dai Wanjun, Hu Dongxia, Zhou Wei, Zhao Junpu, Jing Feng, Yang Zeping, Zhang Kun, Jiang Xuejun, Deng Wu, Zhao Runchang, Peng Zhitao, and Feng Bin  »View Author Affiliations


Applied Optics, Vol. 48, Issue 19, pp. 3691-3694 (2009)
http://dx.doi.org/10.1364/AO.48.003691


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Abstract

A novel scheme to correct aberration of each beam from the front-end to the target point in a thermal inertia laser (TIL) is presented. Each beam contains a deformable mirror (DM) with an aperture of 70 mm × 70 mm at the injection of the main amplifier and a Hartman–Shack (HS) sensor in a parameter diagnostic unit (PDU). A temporary HS sensor for measuring the static aberration of each beam with 1 Hz source is placed at the target point. The sensor will be removed from the target point during the main single shot, so we transfer the results measured at the target point to the sensors in the PDU. Dynamic aberration can also be measured by the HS sensor in the PDU during the single shot. In this way, we need not calibrate the aberration of the PDU, and aberration of each beam can be corrected by the DM with the HS sensor in the PDU. We demonstrate that with this scheme the divergence angle of the TIL pulses can be improved from 100 to less than 60 μrad with a focal length of 2200 mm and beam size of 290 mm × 290 mm , which meets the requirement of a TIL.

© 2009 Optical Society of America

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3300) Lasers and laser optics : Laser beam shaping
(140.6810) Lasers and laser optics : Thermal effects

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: March 2, 2009
Revised Manuscript: May 31, 2009
Manuscript Accepted: June 8, 2009
Published: June 22, 2009

Citation
Dai Wanjun, Hu Dongxia, Zhou Wei, Zhao Junpu, Jing Feng, Yang Zeping, Zhang Kun, Jiang Xuejun, Deng Wu, Zhao Runchang, Peng Zhitao, and Feng Bin, "Beam wavefront control of a thermal inertia laser for inertial confinement fusion application," Appl. Opt. 48, 3691-3694 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-19-3691

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