Yb：Sc2O3 transparent ceramics are fabricated by a conventional ceramic process and sintering in H2 atmosphere. The room-temperature spectroscopic properties are investigated, and the Raman spectrum shows an obvious v...Yb：Sc2O3 transparent ceramics are fabricated by a conventional ceramic process and sintering in H2 atmosphere. The room-temperature spectroscopic properties are investigated, and the Raman spectrum shows an obvious vibration characteristic band centred at 415 cm-1. There are three broad absorption bands around 891, 937, and 971 nm, respectively. The strongest emission peak is centred at 1.04 μm with a broad bandwidth （11 nm） and an emission cross-section of 1.8×10^-20 cm^2. The gain coefficient implies a possible laser ability in a range from 990 nm to 1425 nm. The energy-level structure shows that Yb：Sc2O3 ceramics have large Stark splitting at the ground state level due to their strong crystal field. All the results show that Yb：Sc2O3 transparent ceramics are a promising material for short pulse lasers.展开更多
Yb：Sc2O3 transparent ceramics were fabricated by solid-state reaction and vacuum sintering method. CaO was added as sintering aids by a high energy ball milling. Transparent nearly-fully dense samples were obtained a...Yb：Sc2O3 transparent ceramics were fabricated by solid-state reaction and vacuum sintering method. CaO was added as sintering aids by a high energy ball milling. Transparent nearly-fully dense samples were obtained after 1840℃ sintefing. Using transmitted-light microscope we get the grain sizes are more than 100μm. Using spectrophotometer we get the absorption coefficient centered at 975 nm was 2.65 cm-1. The phosphorescence spectra showed that the line-widths （FWHM） at 975 and 1041 nm were about 4 and 10 nm and the lifetime of Yb ions in Sc2O3 transparent ceramics was about 883 μs. According to the absorption and fluorescence band centers of Yb：Sc2O3 transparent ceramics, the level scheme of Yb3＋ ions in Sc2O3 ceramics could be gotten.展开更多
基金supported by the Key Basic Research Project of Science and Technology Commission of Shanghai, China (Grant No. 09JC1406500)
文摘Yb：Sc2O3 transparent ceramics are fabricated by a conventional ceramic process and sintering in H2 atmosphere. The room-temperature spectroscopic properties are investigated, and the Raman spectrum shows an obvious vibration characteristic band centred at 415 cm-1. There are three broad absorption bands around 891, 937, and 971 nm, respectively. The strongest emission peak is centred at 1.04 μm with a broad bandwidth （11 nm） and an emission cross-section of 1.8×10^-20 cm^2. The gain coefficient implies a possible laser ability in a range from 990 nm to 1425 nm. The energy-level structure shows that Yb：Sc2O3 ceramics have large Stark splitting at the ground state level due to their strong crystal field. All the results show that Yb：Sc2O3 transparent ceramics are a promising material for short pulse lasers.
基金supported by Major Program of the National Natural Science Foundation of China (50990300, 51102257)National Science Foundation for Post-doctoral Scientists of China (200801207)Natural Science Foundation of Shanghai, China (09ZR1435600, 10JC1416000)
文摘Yb：Sc2O3 transparent ceramics were fabricated by solid-state reaction and vacuum sintering method. CaO was added as sintering aids by a high energy ball milling. Transparent nearly-fully dense samples were obtained after 1840℃ sintefing. Using transmitted-light microscope we get the grain sizes are more than 100μm. Using spectrophotometer we get the absorption coefficient centered at 975 nm was 2.65 cm-1. The phosphorescence spectra showed that the line-widths （FWHM） at 975 and 1041 nm were about 4 and 10 nm and the lifetime of Yb ions in Sc2O3 transparent ceramics was about 883 μs. According to the absorption and fluorescence band centers of Yb：Sc2O3 transparent ceramics, the level scheme of Yb3＋ ions in Sc2O3 ceramics could be gotten.
