title: Enhanced mid-infrared emissions of Er3+ at 2.7 μm via Nd3+ sensitization in chalcohalide glass.
abstract: Nd(3+) sensitized Er(3+):(4)I(13/2) mid-IR emissions around 2.7 μm were investigated in the transparent Ga(2)S(3)-GeS(2)-CsCl chalcohalide glasses for the first time. Remarkably, it is found that Nd(3+) greatly enhances Er(3+) 2.7 μm emission by a maximal 20 times, and depopulates the lower level of Er(3+):(4)I(13/2) for population inversion. Based on Judd-Ofelt theory, the 2.7 μm emission cross section is calculated (as high as 0.66×10(-20) cm(2)) and the gain property of the Er(3+):(4)I(11/2)→(4)I(13/2) transition is discussed. Hopefully, the materials studied here may find potential applications in the fields of fiber amplifiers and mid-IR lasers.
authors: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, China.
authors: Hang
authors: H
authors: Lin
authors: Daqin
authors: D
authors: Chen
authors: Yunlong
authors: Y
authors: Yu
authors: Anping
authors: A
authors: Yang
authors: Yuansheng
authors: Y
authors: Wang