Abstract
Optical properties of Nd 3+ doped into K 2YF 5 single crystal have been analysed. A detailed electronic energy level scheme of Nd 3+ ion in the crystalline structure has been deduced from the absorption, emission and time resolved spectra recorded at 12 K. Energy level simulation of Nd 3+ ions in K 2YF 5 has been carried out and the phenomenological crystal field parameters were determined. The root mean square (r.m.s.) standard deviation is 19.0 cm −1, indicating a satisfying agreement between the calculated and experimental levels. The results are also compared to those reported for BaY 2F 8:Nd 3+ and LiYF 4:Nd 3+ crystals, and the tendency of a covalence and crystal field decreasing effect was observed from K 2YF 5, BaY 2F 8 to LiYF 4.
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