Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Scattering-induced downstream beam modulation by plasma scalded mirrors

[+] Author Affiliations
J. R. Schmidt, M. J. Runkel, K. E. Martin, C. J. Stolz

Lawrence Livermore National Lab.

Proc. SPIE 6720, Laser-Induced Damage in Optical Materials: 2007, 67201H (December 20, 2007); doi:10.1117/12.748446
Text Size: A A A
From Conference Volume 6720

  • Laser-Induced Damage in Optical Materials: 2007
  • Gregory J. Exarhos; Arthur H. Guenther; Keith L. Lewis; Detlev Ristau; M. J. Soileau; Christopher J. Stolz
  • Boulder, CO | September 24, 2007

abstract

Previous work concluded that plasma scalds on laser-conditioned multilayer dielectric mirror coatings are a stable, benign damage morphology. Recent large-aperture measurements indicate that plasma scalds may lead to fratricide of down-stream optics by increasing beam contrast. This paper describes the results of measurements performed to examine the effect of quasi-periodic plasma scalds covering the entire clear aperture on downstream beam modulation. A collimated, linearly-polarized 1053-nm beamline was constructed that irradiated approximately 5 cm2 of the plasma scalded region. This beam was propagated ~8 meters and sampled with a 10-bit, megapixel CCD camera and analyzed for contrast (peak/average intensity). A lineout across the sample was built up by translating the optic across the beam. The contrast results were compared to a baseline wedged flat with surface figure of λ/100 and a contrast adder for the plasma scalds calculated. This was defined by. In all, optics with average plasma scald fractions of 0.9, 2.3, 4 and 14% were measured. Preliminary results indicate that plasma scald fractions of 4% and below contribute a contrast adder of less than 2.5%.

© (2007) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

J. R. Schmidt ; M. J. Runkel ; K. E. Martin and C. J. Stolz
"Scattering-induced downstream beam modulation by plasma scalded mirrors", Proc. SPIE 6720, Laser-Induced Damage in Optical Materials: 2007, 67201H (December 20, 2007); doi:10.1117/12.748446; http://dx.doi.org/10.1117/12.748446


Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement


  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.