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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 14 — Jul. 15, 2013
  • pp: 17275–17284

Enhancement of multi-pulse laser induced damage threshold on Cu mirror under vacuum condition

Shin Kajita, Ryo Yasuhara, Masaya Sato, Noriyasu Ohno, Masayuki Tokitani, and Naoaki Yoshida  »View Author Affiliations

Optics Express, Vol. 21, Issue 14, pp. 17275-17284 (2013)

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Multi-pulse laser induced damage threshold (LIDT) for metallic mirrors are important issue for laser diagnostics in future fusion devices. In this paper, the mechanism of multi-pulse LIDT and the influence of the slip formation and oxidization in atmosphere were investigated experimentally with a Nd:YAG pulse laser whose pulse width and wavelength are ∼5 ns and 1064 nm, respectively. From detailed surface analysis of laser irradiated part by transmission electron microscopy (TEM), it was found that the miniaturization of crystal size and slip formation were observed on damaged area. Oxidization feature was also revealed from the TEM analysis. It was shown that the multi-pulse LIDT could be increased under vacuum condition compared with that in air atmosphere.

© 2013 OSA

OCIS Codes
(160.0160) Materials : Materials
(160.3900) Materials : Metals

ToC Category:

Original Manuscript: May 29, 2013
Revised Manuscript: June 25, 2013
Manuscript Accepted: June 27, 2013
Published: July 11, 2013

Shin Kajita, Ryo Yasuhara, Masaya Sato, Noriyasu Ohno, Masayuki Tokitani, and Naoaki Yoshida, "Enhancement of multi-pulse laser induced damage threshold on Cu mirror under vacuum condition," Opt. Express 21, 17275-17284 (2013)

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