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Water-associated surface degradation of CsLiB6O10 crystal during harmonic generation in the ultraviolet region

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Abstract

A study of the mechanisms of CsLiB6O10 (CLBO) crystal performance degradation during harmonic generation in the ultraviolet (UV) region was performed. The degradation rate of transmissivity during irradiation with the fourth harmonic light of an Nd3+ doped YLiF4 laser (4.7 eV) was linearly proportional to the concentration of hydroxyl (OH) groups in the CLBO crystal. In this study, the formation of OH groups was recognized by infrared absorption spectroscopy, and a method for determination of OH groups was proposed. The concentration of OH groups in the CLBO was linearly proportional to water vapor pressure and the CLBO containing OH groups absorbed UV light. We propose that one of the main mechanisms of surface degradation is the generation and growth of the mutants and that these mutants are generated by a UV photon-assisted reaction via OH group formation associated with absorbing water molecules into CLBO crystal.

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Author notes

  1. Yukihiro Morimoto

    Present address: , 1194 Sazuchi, 671-0224, Bessyo-cho, Himeji, Japan

Authors and Affiliations

  1. Research and Development Center, Gotenba Laboratory, Ushio Inc., 1-90 Komakado, 412-0038, Gotenba, Shizuoka, Japan

    Yukihiro Morimoto, Shintaro Miyazawa & Yoshio Kagebayashi

  2. Ushio Research Institute of Technology Inc., 1–90 Komakado, 412-0038, Gotenba, Shizuoka, Japan

    Naoki Kitatochi, Toshio Yokota & Jun Sakuma

Authors
  1. Yukihiro Morimoto
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  2. Shintaro Miyazawa
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  3. Yoshio Kagebayashi
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  4. Naoki Kitatochi
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  5. Toshio Yokota
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  6. Jun Sakuma
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Correspondence to Yukihiro Morimoto.

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Morimoto, Y., Miyazawa, S., Kagebayashi, Y. et al. Water-associated surface degradation of CsLiB6O10 crystal during harmonic generation in the ultraviolet region. Journal of Materials Research 16, 2082–2090 (2001). https://doi.org/10.1557/JMR.2001.0285

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  • DOI: https://doi.org/10.1557/JMR.2001.0285

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