Transparent Ni^2＋-doped magnesium aluminosilicate glass ceramics are prepared. The formation of petalite-type crystallites in the glass ceramics is confirmed by x-ray diffraction. Broadband infrared luminescence cent...Transparent Ni^2＋-doped magnesium aluminosilicate glass ceramics are prepared. The formation of petalite-type crystallites in the glass ceramics is confirmed by x-ray diffraction. Broadband infrared luminescence centred at around 1235nm with full width at half maximum （FWHM） of about 300nm is observed from the Ni^2＋-doped glass ceramics. The observed infrared emission could be attributed to the ^3T2（F） → ^3A2（F） transition of octahedral Ni^2＋ ions in petalite-type crystallites. Theproduct of the fluorescence lifetime and the stimulated emission cross sections is 1.2 ×10-24 cm^2s.展开更多
利用MCVD结合溶液掺杂法制备了Tm-Al共掺石英光纤预制棒。利用电子探针对预制棒切片进行浓度测试,预制棒芯层Tm2O3的掺杂浓度为2.106wt%,Al2O3的掺杂浓度为5.047%。成功拉制内包层为六边形的掺铥光纤,通过搭建激光测试平台,掺铥光纤的...利用MCVD结合溶液掺杂法制备了Tm-Al共掺石英光纤预制棒。利用电子探针对预制棒切片进行浓度测试,预制棒芯层Tm2O3的掺杂浓度为2.106wt%,Al2O3的掺杂浓度为5.047%。成功拉制内包层为六边形的掺铥光纤,通过搭建激光测试平台,掺铥光纤的斜率效率达到25%,内包层吸收系数为3.6 d B/m。展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 50672087, and the National Basic Research Programme of China under Grant No 2006CBS06000b.
文摘Transparent Ni^2＋-doped magnesium aluminosilicate glass ceramics are prepared. The formation of petalite-type crystallites in the glass ceramics is confirmed by x-ray diffraction. Broadband infrared luminescence centred at around 1235nm with full width at half maximum （FWHM） of about 300nm is observed from the Ni^2＋-doped glass ceramics. The observed infrared emission could be attributed to the ^3T2（F） → ^3A2（F） transition of octahedral Ni^2＋ ions in petalite-type crystallites. Theproduct of the fluorescence lifetime and the stimulated emission cross sections is 1.2 ×10-24 cm^2s.
文摘利用MCVD结合溶液掺杂法制备了Tm-Al共掺石英光纤预制棒。利用电子探针对预制棒切片进行浓度测试,预制棒芯层Tm2O3的掺杂浓度为2.106wt%,Al2O3的掺杂浓度为5.047%。成功拉制内包层为六边形的掺铥光纤,通过搭建激光测试平台,掺铥光纤的斜率效率达到25%,内包层吸收系数为3.6 d B/m。
