2m emission properties and nonresonant energy transfer of Er3+ and Ho3+ codoped silicate glasses. Academic Article uri icon

abstract

  • 2.0m emission properties of Er3+/Ho3+ codoped silicate glasses were investigated pumped by 980nm LD. Absorption spectra were determined. Intense mid-infrared emissions near 2m are observed. The spectral components of the 2m fluorescence band were analyzed and an equivalent model of four-level system was proposed to describe broadband 2m emission. Low OH- absorption coefficient (0.23cm-1), high fluorescence lifetime (2.95ms) and large emission cross section (5.6110-21cm2) corresponding to Ho3+: 5I75I8 transition were obtained from the prepared glass. Additionally, energy transfer efficiency from the Er3+: 4I13/2 to the Ho3+: 5I7 level can reach as high as 85.9% at 0.75mol% Ho2O3 doping concentration. Energy transfer microscopic parameters (CDA) via the host-assisted spectral overlap function were also calculated to elucidate the observed 2m emissions in detail. Moreover, the rate equation model between Er3+ and Ho3+ ions was developed to elucidate 2m fluorescence behaviors with the change of Ho3+ concentration. All results reveal that Er3+/Ho3+ codoped silicate glass is a promising material for improving the Ho3+ 2.0m fiber laser performance.

published proceedings

  • Sci Rep

author list (cited authors)

  • Cao, R., Lu, Y. u., Tian, Y., Huang, F., Guo, Y., Xu, S., & Zhang, J.

citation count

  • 23

complete list of authors

  • Cao, Ruijie||Lu, Yu||Tian, Ying||Huang, Feifei||Guo, Yanyan||Xu, Shiqing||Zhang, Junjie

publication date

  • November 2016