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Proceedings Article

Effects of wavelengths combination on initiation and growth of laser-induced surface damage in SiO2

[+] Author Affiliations
L. Lamaignere, S. Reyne, M. Loiseau, J.-C. Poncetta, H. Bercegol

CEA-Ctr. d’Etudes Scientifiques et Techniques d’Aquitaine (France)

Proc. SPIE 6720, Laser-Induced Damage in Optical Materials: 2007, 67200F (December 18, 2007); doi:10.1117/12.753057
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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

Campaigns of laser damage tests at 1w of Nd-YAG laser (1064 nm), 3w and with a combination of these two wavelengths, were conducted to complete previous existing data on damage growth in fused silica output surface. It is known that UV light is very effective in inducing preexisting damage craters to grow. When both wavelengths are present, the effect of 1w beam on damage growth depends on the delay between the IR and the UV beam. When the 1w reaches the sample before the 3w, it has nearly no consequence on growth rate. On the opposite, when the IR beam is delayed and strikes the sample after the 3w pulse, its energy simply adds to the UV in enhancing damage growth. Damage initiation is much more affected by 3w than 1w pulses. However, the number of surface damage craters also increased by the addition of 1w photons to the UV beam.

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

L. Lamaignere ; S. Reyne ; M. Loiseau ; J.-C. Poncetta and H. Bercegol
"Effects of wavelengths combination on initiation and growth of laser-induced surface damage in SiO2", Proc. SPIE 6720, Laser-Induced Damage in Optical Materials: 2007, 67200F (December 18, 2007); doi:10.1117/12.753057; http://dx.doi.org/10.1117/12.753057


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