Enhancement of 1.54 μm emission in Er:LiNbO_3 crystal by codoping with Zn~(2+) ions

• 作 者: 钱艳楠 王锐 徐超 邢丽丽 徐衍岭 杨春辉
• 机 构: Department of Chemistry,Harbin Institute of Technology,
• 出 处: Journal of Rare Earths
• 发表日期: 2012年01期
• 关键词: exponential lifetime peaking attributed spectroscopic decay transparency spectro

The enhanced intensity and lengthened lifetime of 1.54 μm emission were observed for Er:LiNbO3 crystal codoped with Zn2+ ions.The ZnO codoping led to the reduction of the green upconversion emission in Er:LiNbO3 crystals.The decay trace of the 4S3/2→4I15/2 was ob-viously nonexponential for Er:LiNbO3 codoped with 0 and 3 mol.% ZnO,but became exponential for one codoped with 6 mol.% ZnO.The OH-absorption spectra showed after codoping with Zn2+ ions,the OH-absorption peaking position shifted from ~3495 to 3484 cm-1,and the absorption cross section decreased.These spectroscopic characteristics suggested that the improvement of 1.54 μm emission was attributed to the reduction of Er3+ cluster sites.

The enhanced intensity and lengthened lifetime of 1.54 μm emission were observed for Er: LiNbO3 crystal codoped with Zn2 + ions. The ZnO codoping led to the reduction of the green upconversion emission in Er: LiNbO3 crystals.The decay trace of the 4S3 / 2 → 4I15 / 2 was ob-viously nonexponential for Er: LiNbO3 codoped with 0 and 3 mol.% ZnO, but became exponential for one codoped with 6 mol.% ZnO. The OH-absorption spectra showed after codoping with Zn2 + ions, the OH-absorption peaking shifted from ~ 3495 to 3484 cm-1, and the absorption cross section decreased. The spectroscopy characteristics suggested that the improvement of 1.54 μm emission was attributed to the reduction of Er3 + cluster sites.