Laser-induced damage in DKDP crystals under simultaneous exposure to laser harmonics

R. A. Negres, P. Demange, H. B. Radousky, S. G. Demos

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

While KDP and DKDP crystals remain the only viable solution for frequency conversion in large aperture laser systems in the foreseeable future, our understanding of damage behavior in the presence of multiple colors is very limited. Such conditions exist during normal operation where, for third harmonic generation, 1ω, 2ω and 3ω components are present with different energy ratios as they propagate inside the crystal. The objective of this work is to shed light into the damage behavior of frequency conversion crystals during operational conditions as well as probe the fundamental mechanisms of damage initiation. We have performed a series of experiments to quantify the damage performance of pristine (unconditioned) DKDP material under simultaneous exposure to 2ω and 3ω laser pulses from a 3-ns Nd:YAG laser system as a function of the laser fluences at each frequency. Results show that simultaneous dual wavelength exposure leads to a much larger damage density as compared to the total damage resulting from separate exposure at each wavelength. Furthermore, under such excitation conditions, the damage performance is directly related to and can be predicted from the damage behavior of the crystal at each wavelength separately while the mechanism and type of defects responsible for damage initiation are shown to be the same at both 2ω and 3ω excitation.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsG.J. Exarhos, A.H. Guenther, K.L. Lewis, D. Ristau, M.J. Souleau, C.J. Stolz
Volume5991
DOIs
StatePublished - 2005
Externally publishedYes
Event37th Annual Boulder Damage Symposium Proceedings - Laser-Induced Damage in Optical Materials: 2005 - Boulder, CO, United States
Duration: Sep 19 2005Sep 21 2005

Other

Other37th Annual Boulder Damage Symposium Proceedings - Laser-Induced Damage in Optical Materials: 2005
CountryUnited States
CityBoulder, CO
Period9/19/059/21/05

Keywords

  • Kdp and dkdp crystals
  • Laser-induced damage
  • Nonlinear frequency conversion

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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    Negres, R. A., Demange, P., Radousky, H. B., & Demos, S. G. (2005). Laser-induced damage in DKDP crystals under simultaneous exposure to laser harmonics. In G. J. Exarhos, A. H. Guenther, K. L. Lewis, D. Ristau, M. J. Souleau, & C. J. Stolz (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 5991). [59911S] https://doi.org/10.1117/12.637666