Temperature dependences of fluorescence characteristic for Nd/Cr:YAG materials

Yoshiyuki Honda; Minoru Yoshida; Shinji Motokoshi; Kana Fujioka; Takahisa Jitsuno; Masahiro Nakatsuka

doi:10.1117/12.899047

22 November 2011 Temperature dependences of fluorescence characteristic for Nd/Cr:YAG materials

Yoshiyuki Honda, Minoru Yoshida, Shinji Motokoshi, Kana Fujioka, Takahisa Jitsuno, Masahiro Nakatsuka

Proceedings Volume 8190, Laser-Induced Damage in Optical Materials: 2011; 819014 (2011) https://doi.org/10.1117/12.899047
Event: SPIE Laser Damage, 2011, Boulder, Colorado, United States

Abstract

Cr³⁺ co-doped Nd:YAG is very useful for the flashlamp or solar pumped laser through Cr³⁺ ion has broad absorption bands in the visible region and an efficient energy transfer caused from Cr³⁺ to Nd³⁺. But the process of the energy transfer is not understood well. It is also a problem that the absorption at near infrared is appeared with changes of Cr³⁺ to Cr⁴⁺. We investigated these problems by measuring the temperature dependence of fluorescence characteristics (lifetime, excitation fluorescence and absorption) and the change after UV irradiation. The excitation fluorescence spectra at 450 K increased because the Cr³⁺ absorption depended on temperature. The fluorescence lifetime excited at the Cr³⁺ absorption bands shortened with increase temperature, that is, the energy transfer time will be short. Solarization was appeared in Nd/Cr:YAG ceramics irradiated by KrF excimer laser pulses at 248 nm.

Citation Download Citation

Yoshiyuki Honda, Minoru Yoshida, Shinji Motokoshi, Kana Fujioka, Takahisa Jitsuno, and Masahiro Nakatsuka "Temperature dependences of fluorescence characteristic for Nd/Cr:YAG materials", Proc. SPIE 8190, Laser-Induced Damage in Optical Materials: 2011, 819014 (22 November 2011); https://doi.org/10.1117/12.899047

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