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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 22 — Oct. 22, 2012
  • pp: 24482–24487

Improvement on laser-induced damage threshold of sol-gel ZrO2 coatings by crystal structure tuning

Xiaodong Wang, Guangming Wu, Bin Zhou, and Jun Shen  »View Author Affiliations


Optics Express, Vol. 20, Issue 22, pp. 24482-24487 (2012)
http://dx.doi.org/10.1364/OE.20.024482


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Abstract

With the development and construction of high peak power lasers it has become more and more important to improve the laser-induced damage threshold (LIDT) of optical coatings. In this paper, ZrO2 coatings were deposited by sol-gel dip-coating method and further treated by conventional furnace annealing (CFA) and rapid thermal annealing (RTA) at different temperatures. By measuring the Raman spectra, optical constants and LIDT, the influence of annealing on the crystal structures, refractive indices, laser-induced damage characters of ZrO2 coatings were analyzed. The results show that RTA is effective in tuning the crystal structures of ZrO2 coatings. Lattice mismatch between monoclinic and tetragonal phases happened on CFA treated film reduces its refractive index, hence the film annealed by RTA at 800 °C realizes a higher refractive index. Compared with CFA annealed films, RTA annealed films were no more susceptible to laser damage due to their crystal structure difference caused lager band gap.

© 2012 OSA

OCIS Codes
(160.4670) Materials : Optical materials
(160.6060) Materials : Solgel
(310.3840) Thin films : Materials and process characterization
(310.6860) Thin films : Thin films, optical properties

ToC Category:
Thin Films

History
Original Manuscript: July 24, 2012
Revised Manuscript: September 28, 2012
Manuscript Accepted: September 30, 2012
Published: October 11, 2012

Citation
Xiaodong Wang, Guangming Wu, Bin Zhou, and Jun Shen, "Improvement on laser-induced damage threshold of sol-gel ZrO2 coatings by crystal structure tuning," Opt. Express 20, 24482-24487 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-22-24482


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