Energy transfer and frequency upconversion in Pr3+-doped ZBLAN glass

Luminescence and structural characterization on praseodymium (Pr3+) doped potassium bromide (KBr) single crystals

“…The deconvoluted TL emission bands consist of two peaks at 642 and 710 nm due to the characteristic 3 P 0 → 3 F 2 , and 1 D 2 → 3 F 4 transitions of Pr 3+ ion respectively. [15] It shows that the TL emission band matches well with the PL emission band which is shown in Table 1.…”

“…These bands are assigned to the following transitions: 3 P 2 → 3 H 6 , 3 P 0 → 3 H 6 , 1 D 2 → 3 P 4 and 3 P 0 → 3 F 2 respectively. Assignment have been made by previous research . The relatively sharp quite intense band around 721 nm in the emission spectrum evidenced that for illuminating device applications.…”

Enhancement of Pr3+ luminescence in TeO2–ZnO–Nb2O5–MoO3 glasses containing silver nanoparticles

“…The inset shows the relative emission intensity of the observed emission bands vs. heat-treatment time. Seven emission bands centered at 530 nm, 594 nm, 612 nm, 645 nm, 680 nm, 703 nm, and 728 nm are observed and attributed to the 3 P 0 → 3 H 5 , 1 D 2 → 3 H 4 , 3 P 0 → 3 H 6 , 3 P 0 → 3 F 2 , 3 P 1 → 3 F 3 , 3 P 0 → 3 F 3 , and 3 P 0 → 3 F 4 transitions of Pr 3+ ions [21,36], respectively. Sample D shows the largest luminescence enhancement for most of the transitions observed, indicating that the best condition for the NP nucleation is achieved for heat-treatment during 10 h. In other words, saturation is observed, which indicates that all silver ions have been reduced to metallic silver for thermal treatment during about 10 h. Fig.…”

Spectral analysis of Pr3+-, Sm3+- and Dy3+-doped transparent GeO2–BaO–TiO2 glass ceramics

“…A 1.3 mm Pr 3+ :ZBLAN optical fiber amplifier has been demonstrated [12]. The upconversion lasers of 491, 520 and 635 nm have been realized in Pr 3+ :ZBLAN under infrared laser pump [13] indicating that it is an attractive upconversion laser media. Similarly, the Sm 3+ (4f 5 ) ion is one of the most interesting Ln ions to analyze the fluorescence properties as its emitting 4 G 5/2 level exhibits relatively high quantum efficiency and also shows different quenching emission channels.…”