Absorption intensity analysis of Pr3+: Y3Al5O12

Spectroscopic properties of Pr3+:Gd3Ga5O12 crystal

“…It is interesting to point that at 4 K the decay 1 D 2 → 3 H 4 profile of Pr:GGG is exponential with a lifetime of 260 s [23], as in contrast with the above results of this job. The quantum efficiency of the 1 D 2 → 3 H 4 transition for Pr:GGG crystal is calculated to be 92.5%, which is higher than that of 1% Pr:YAG: 90% [37]. Furthermore, the peak emission cross-sections of the 1 D 2 → 3 H 4 as yellow laser channel is 2.52 × 10 −20 cm 2 as seen from Table 4; combing the large emission cross-sections value with the high quantum efficiency, it might be possible to realize yellow laser gain in Pr:GGG crystal.…”

“…And the lifetime 3 P 0 → 3 H 6 transition was fitted to be 21.0 s, which 44]. By following the calculation equation of quantum efficiency Á = f / r , we can obtain the quantum efficiencies of 3 P 0 → 3 H 6 transitions to be 29.6%, which can be compared with the quantum efficiencies of 1% Pr:YAG (82.3% [37]) and 1% YAP (70% [43]). The relatively low quantum efficiency of this transition might be due to the static perturbations of the crystal fields led by Gd 3+ in octahedral a sites being a non-stoichiometric defect [21].…”

Spectroscopic properties of Pr3+:SrMoO4 crystal

“…This suggests that no energy transfer processes involving the 1 D 2 level are present in this system and the mean value of the fluorescence lifetime was estimated to be 92.88 s, which can be compared with Pr 3+ :YAP: 28 s [22]. The quantum efficiency was calculated to be 93.39% according the equation Á = f / r for the 1 D 2 → 3 F 4 transition, which is higher than Pr 3+ :YAG: 90% [16]. The result demonstrates that Pr 3+ :SrMoO 4 crystal has high luminescent quantum efficiency.…”

Optical properties of Sm3+ ions and influence of odd third‐order intensity parameters in fluoride glasses

“…However, it has been observed in any cases that standard theory leads to a negative value of the phenomenological Ω λ (λ = 2) intensity parameter for Pr 3+ ions in crystals and glasses [16][17][18][19][20], and now in Sm 3+ in fluoroindate glasses, contradicting the definition of these parameters. It is also worth pointing out that Ω λ values are very dependent on the transitions used to calculate them.…”