Crystal growth and spectroscopic investigations of Tm³⁺ ions doped 5NaF-9YF₃ fluoride single crystals

Abstract

The Tm3+:5NaF-9YF3 single crystals were grown by Czochralski pulling technique after purification of the starting materials. The obtained crystals are of good optical quality. Optical absorption of this material is investigated. The Judd–Ofelt (JO) analysis was applied to the room temperature absorption intensities of Tm3+ ions to determine the so-called JO intensity parameters and the transition strengths. These JO parameters are used to calculate the radiative transition probabilities, the radiation lifetimes and the branching ratios. The results obtained indicate that Tm3+:5NaF-9YF3 may be considered as a laser active material.

Optical Characterization of Erbium Doped KY<sub>3</sub>F<sub>10</sub> Fluoride Single Crystals

“…The observed bands are attributed, respectively, to the multiplets 4 [24][25][26][27][28]. The spectroscopic quality factor χ =  4 / 6 is approximately 0.37 which is in the range of It is obvious that the branching ratio and the radiative lifetime are two critical parameters that can predict the possibility of laser emission.…”