R2O3 (R = La, Y) modified erbium activated germanate glasses for mid-infrared 2.7 m laser materials. Academic Article uri icon

abstract

  • Er(3+) activated germanate glasses modified by La2O3 and Y2O3 with good thermal stability were prepared. 2.7 m fluorescence was observed and corresponding radiative properties were investigated. A detailed discussion of J-O parameters has been carried out based on absorption spectra and Judd-Ofelt theory. The peak emission cross sections of La2O3 and Y2O3 modified germanate glass are (14.3 0.10) 10(-21) cm(2) and (15.4 0.10) 10(-21) cm(2), respectively. Non-radiative relaxation rate constants and energy transfer coefficients of (4)I11/2 and (4)I13/2 levels have been obtained and discussed to understand the 2.7 m fluorescence behavior. Moreover, the energy transfer processes of (4)I11/2 and (4)I13/2 level were quantitatively analyzed according to Dexter's theory and Inokuti-Hirayama model. The theoretical calculations are in good agreement with the observed 2.7 m fluorescence phenomena. Results demonstrate that the Y2O3 modified germanate glass, which possesses more excellent spectroscopic properties than La2O3 modified germanate glass, might be an attractive candidate for mid-infrared laser.

published proceedings

  • Sci Rep

author list (cited authors)

  • Cai, M., Zhou, B., Wang, F., Wei, T., Tian, Y., Zhou, J., Xu, S., & Zhang, J.

citation count

  • 15

complete list of authors

  • Cai, Muzhi||Zhou, Beier||Wang, Fengchao||Wei, Tao||Tian, Ying||Zhou, Jiajia||Xu, Shiqing||Zhang, Junjie

publication date

  • August 2015