Three kinds of - and -codoped laser crystal with different Na:Yb ratios of 0, 1.5, and 10 are grown by the temperature gradient technique. Room-temperature absorption, photoluminescence spectra, and fluorescence lifetimes belonging to the transitions between ground state and excited state of ions in the three crystals are measured to study the effect of . Experimental results show that codoping ions in different Na:Yb ratios can modulate the spectroscopy and photoluminescence properties of ions in a lattice in a large scope.
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