An efficient 1.8 mu m emission in Tm3+ and Yb3+/Tm3+ doped fluoride modified germanate glasses for a diode-pump mid-infrared laser

作者：Wang, W C; Yuan, J; Liu, X Y; Chen, D D; Zhang, Q Y^*; Jiang, Z H

来源：Journal of Non-Crystalline Solids, 2014, 404: 19-25.

DOI：10.1016/j.jnoncryso1.2014.07.026

• Laser materials
• Germanate glasses
• 1.8 mu m emission

The competition between infrared down-conversion (DC) and visible up-conversion (UC) is systemically studied in Tm3+ and/or Yb3+/Tm3+ co-doped fluoride modified germanate glasses. Based on the absorption spectra, the Judd-Ofelt intensity parameters, absorption and emission cross-sections, figure of merit (FOM), and saturated gain coefficient are calculated and analyzed. An intense 1.8 pm emission is obtained upon. 808 nm laser diode (ID) excitation in Tm3+ doped samples, while an efficient 1.8 mu m emission is observed by 980 nm LD in Yb3+/ Tm3+ co-doped samples, along with visible DC emissions. It is found that F-3(4) state of Tm3+ can be easily populated and then further excited to higher excited states through Yb3+ upon 980 nm LD. Our results suggest that these Tm3+ doped fluoride modified germanate glasses are of great significance for searching efficient mid-infrared laser materials.

• 出版日期2014-11-15
• 单位华南理工大学