Abstract
Optical properties of three fluoride single crystals (YF 3, LiLuF 4 and KY 3F 10) doped with Nd 3+ ions have been studied. Low temperature absorption spectra lead to the Stark energy level scheme up to 29 000 cm −1. From room temperature absorption measurements and using the Judd–Ofelt theory, the Ω 2, Ω 4 and Ω 6 parameters have been obtained in the LiLuF 4:Nd 3+ and KY 3F 10:Nd 3+ crystals and radiative lifetimes have been calculated.
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