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We present a detailed analysis of luminescence behavior of singly Nd3+ doped and Nd3+, Na+ co-doped calcium aluminates powders: Ca1−xNdxAl4O7 and Ca1−2xNdxNaxAl4O7 (x=0.001–0.1). Relatively intense Nd3+ luminescence in IR region corresponding to typical 4F3/2→4IJ (J=9/2–13/2) transitions with maximum located at about 1079nm was obtained in all samples on direct excitation into f–f levels. The effect...
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