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We have measured the lifetimes of the 2.8 μm emission band for Er3+‐ and Ho3+‐doped fluorides including LiYF4, BaY2F8, LaF3, and KY3F10, and for numerous oxides such as Y3Al5O12, YAlO3, La2Be2O5, and other crystals. Several quantum yields and branching ratios were experimentally evaluated as well, in order to determine the radiative lifetime of the upper laser level for the 2.8 μm transition. This information was employed to assess the cross sections of the 2.8 μm infrared emission band for several of these crystals, which involves the 4I11/2→4I13/2 transition for Er, and the 5I6→5I7 for Ho. © 1995 American Institute of Physics.
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