Abstract
sensitized : mid-IR emissions around were investigated in the transparent chalcohalide glasses for the first time. Remarkably, it is found that greatly enhances
emission by a maximal 20 times, and depopulates the lower level of : for population inversion. Based on Judd–Ofelt theory, the emission cross section is calculated (as high as ) and the gain property of the : 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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