Er³⁺ cross‐section spectra of Er³⁺/Pr³⁺:Gd₃Ga₅O₁₂ single‐crystal: Pr³⁺‐codoping effect

Abstract

Fluorescence and absorption spectra at 530 nm (2H11/2→4I15/2), 560 nm (4S3/2→4I15/2), 660 nm (4F9/2→4I15/2), 980 nm (4I11/2→4I15/2), 1530 nm (4I13/2→4I15/2), and 2710 nm (4I11/2→4I13/2) of Er3+ in Gd3Ga5O12 single‐crystal codoped with Pr3+ have been measured. Judd‐Ofelt analysis yields the intensity parameters Ω2 = (0.68 ± 0.03) × 10−20 cm2, Ω4 = (0.60 ± 0.07) × 10−20 cm2, and Ω6 = (0.90 ± 0.17) × 10−20 cm2. A comparison with previously reported values of Er3+‐only doping case shows that Pr3+‐codoping causes slight change of both Ω2 and Ω4, while onefold increase of Ω6. From calculated radiative rates and measured fluorescence spectra, Er3+ emission cross‐section spectra were calibrated at first. Then, the absorption cross‐section spectra were calculated using McCumber relation. In parallel, the absorption cross‐section spectra were also obtained from the measured absorption spectrum, and compared with those obtained from the McCumber relation. The comparison shows that both methods give consistent result of absorption cross‐section spectrum. Further comparison with Er3+‐only doping case shows that Pr3+‐codoping causes considerable change of Er3+ cross‐section value. In spectrally mixing regions of Er3+ and Pr3+, Pr3+ emission affects little the determination of Er3+ emission cross‐section as Pr3+ fluorescence is much weaker than Er3+ fluorescence due to low Pr3+ concentration.

Highly efficient tunable multi-wavelength laser properties of Er3+,Yb3+,Pr3+ triple-doped BaLaGa3O7 crystal at ∼2.7 μm

“…As a result, the transitions from the higher Stark sub-level of 4 I 11/2 to the lower level led to longer wavelength emission as reported for the Er:GGG and Er/Pr:GGG. 23,24…”

“…As a result, the transitions from the higher Stark sub-level of 4 I 11/2 to the lower level led to longer wavelength emission as reported for the Er:GGG and Er/Pr:GGG. 23,24 The long-term power stability of the CW Er/Yb/Pr:BLGO laser was measured as shown in Fig. 8.…”

Micromechanical Properties of Gd3Ga5O12 Crystals Irradiated with Swift Heavy Ions

“…As a result, all the gadolinium ion transitions occur in the ultraviolet domain, surpassing 32000 cm -1 . These transitions originate from the basal state 8 S7/2 and lead to excited states that undergo splitting by the crystal field's multiplets for the terms 6 P, 6 I, and 6 D. Absorption bands discernible at wavelengths 254 nm, 275 nm, and 313 nm can be respectively attributed to the transitions 8 S7/2 → 6 Dj, 8 S7/2 → 6 Ij, and 8 S7/2 → 6 Pj [23]. Notably, GGG single crystals are across the visible to nearinfrared spectrum range.…”

“…Moreover, they possess notable hardness and adaptability to doping with diverse impurities. Numerous studies employing ellipsometry, transmission spectra analysis, photoluminescence, and neutron diffraction have delved into their optical, thermo-optical, magnetic, and magneto-optical properties [6][7][8].…”

Fluoroindate glasses co-doped with Pr3+/Er3+ for near-infrared luminescence applications

“…Among rare earths, the trivalent Pr 3+ ions exhibit broadband near-infrared luminescence covering a wavelength range from 1.2 μm to 1.7 μm, which is really important for optical fiber amplifiers operating at O-band (1260-1360 nm), E-band (1360-1460 nm), S-band (1460-1530 nm), C-band (1530-1565 nm), and L-band (1565-1625 nm) 21 . The recent results indicate that glasses [22][23][24][25] and crystals 26 co-doped with Pr 3+ /Er 3+ seems to be quite good candidates for broadband near-IR luminescence. The superbroadband near-IR luminescence is contributed mainly by the 1 D 2 → 1 G 4 (Pr 3+ ) and 4 I 13/2 → 4 I 15/2 (Er 3+ ) transitions which lead to emission lines located at about 1.48 and 1.53 μm 25 .…”