Abstract

Nd3+ sensitized Er3+:I11/24I13/24 mid-IR emissions around 2.7μm were investigated in the transparent Ga2S3GeS2CsCl chalcohalide glasses for the first time. Remarkably, it is found that Nd3+ greatly enhances Er3+ 2.7μm emission by a maximal 20 times, and depopulates the lower level of Er3+:I13/24 for population inversion. Based on Judd–Ofelt theory, the 2.7μm emission cross section is calculated (as high as 0.66×1020cm2) and the gain property of the Er3+:I11/24I13/24 transition is discussed. Hopefully, the materials studied here may find potential applications in the fields of fiber amplifiers and mid-IR lasers.

© 2011 Optical Society of America

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