Laser-diode excited intense upconversion luminescence of Er 3+ in bismuth--lead--germanate glasses
李涛, 张勤远, 姜中宏
Laser-diode excited intense upconversion luminescence of Er 3+ in bismuth--lead--germanate glasses
Li Tao(李涛), Zhang Qin-Yuan(张勤远), and Jiang Zhong-Hong(姜中宏)
中国物理B . 2007, (4): 1155 -1158 .  DOI: 10.1088/1009-1963/16/4/050