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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 6 — Mar. 25, 2013
  • pp: 7285–7293

Improvement and formation of UV-induced damage on LBO crystal surface during long-term high-power third-harmonic generation

Hailong Hong, Qiang Liu, Lei Huang, and Mali Gong  »View Author Affiliations

Optics Express, Vol. 21, Issue 6, pp. 7285-7293 (2013)

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We demonstrate the improvement and formation of UV-induced damage on LBO crystal output surface during long-term (130 h) high-power (20 W) high-repetition-rate (80 kHz) third-harmonic generation. The output surface was super-polished (RMS surface roughness <0.6 nm) to sub-nanometer scale super smooth roughness. The surface lifetime has been improved more than 20-fold compared with the as-polished ones (RMS surface roughness 4.0~8.0 nm). The damage could be attributed to the consequence of thermal effects resulted from impurity absorptions. Simultaneously, it was verified that the impurities originated in part from the UV-induced deposition.

© 2013 OSA

OCIS Codes
(140.3330) Lasers and laser optics : Laser damage
(140.3610) Lasers and laser optics : Lasers, ultraviolet
(160.4330) Materials : Nonlinear optical materials

ToC Category:
Lasers and Laser Optics

Original Manuscript: December 20, 2012
Revised Manuscript: March 1, 2013
Manuscript Accepted: March 4, 2013
Published: March 15, 2013

Hailong Hong, Qiang Liu, Lei Huang, and Mali Gong, "Improvement and formation of UV-induced damage on LBO crystal surface during long-term high-power third-harmonic generation," Opt. Express 21, 7285-7293 (2013)

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