Judd-Ofelt Analysis of the Er[sup 3+] Ions in Double-Doped CaF[sub 2]:(Er[sup 3+],Yb[sup 3+]) Crystal

Spectroscopic Characterization of Er3+-Doped Caf2 Nanoparticles: Luminescence Concentration Quenching, Radiation Trapping and Transition Probabilities

“…S2., the t -parameters seem to be dependent on the nature of the sample. Additionally, and in relation to the radiative lifetime , it should be noted that it is higher than the value reported for crystalline samples, = 7.6 7.7ms rad [39,46], but lower that those found in transparent ceramics, = 13.2ms…”

“…This value has been used to determine that in CaF 2 :Er 3+ NPs the JO intensity parameters are = 2,4,6 1.97, 0.91 and 1.34 in units of 10 -20 cm 2 . In the supplementary material, these values are compared with the intensity parameters previously reported in Er 3+ -doped CaF 2 crystals [39,46] and in transparent ceramics based on this material [47]. As it is shown in Fig.…”

Growth, Thermal and Spectral Properties of Er3+-Doped and Er3+/Yb3+-Codoped Li3Ba2La3(WO4)8 Crystals

“…The oscillator strength parameters Ω t (t = 2, 4, 6) can be fitted from the room-temperature absorption spectra, then the spontaneous emission probabilities, radiative lifetime and fluorescence branching ratios can be obtained. The detailed calculation procedure is similar to that reported in Ref [38]. The reduced matrix elements values of unit tensor operators used in the calculation could be found in Ref [39], [40].…”

Influence of Yb3+ions on the optical properties of double-doped Er,Yb : CaF2crystals

“…The Judd-Ofelt (J-O) model [6,7] provides a theoretical approach for the estimation of the magnitude of the forced (4f-4f) transitions of RE ions in a wide variety of laser host media. This model has been used for the investigation of various RE ion properties, both in crystalline and glass hosts [1][2][3][4][5][8][9][10].…”