Optical spectroscopy of Dy 3+ -doped CaGdAlO 4 single crystal for potential use in solid-state yellow lasers

Crystal growth, spectroscopic characteristics, and Judd-Ofelt analysis of Dy:Lu2O3for yellow laser

“…Ω 4 /Ω 6 is used as a spectroscopic quality factor and is a significant characteristic parameter for estimating the stimulated emission efficiency. [27] As shown in Table 2, the value of Ω 4 /Ω 6 for Dy:Lu 2 O 3 is larger than that for most other crystals, revealing that Dy:Lu 2 O 3 is an excellent candidate for laser emission. The radiative lifetime τ rad , fluorescence branching ratio β and spontaneous radiation transition probability A for a Dy:Lu 2 O 3 crystal were calculated, and the results are shown in Table 3.…”

“…In a Dy:Lu 2 O 3 crystal, the 4 F 9/2 → 6 H 13/2 transition shows the largest fluorescence branching ratio of 61.19%, which indicates a high possibility of yellow emission around 574 nm. Moreover, the radiative lifetime τ rad of Dy:Lu 2 O 3 (756 µs) is comparable to Dy:YAP (757 µs) [2] and is larger than that of Dy:CaGdAlO 4 (501 µs), [27] Dy:Li 3 Ba 2 La 3 (MoO 4 ) 8 (215 µs), [28] and Dy:NaGd(WO 4 ) 2 (281 µs), [35] indicating Dy:Lu 2 O 3 has excellent energy storage capability. 574 nm, 673 nm, and 761 nm, respectively.…”

Structure and spectral properties of Dy3+ doped CaYAlO4 single crystal

“…. The fluorescence lifetime of Dy 3+ : 4 F 9/2 level is 0.316 ms, which is much longer www.nature.com/scientificreports/ than that of Dy: CaGdAlO 4 46 and Dy: LiNbO 3 47 . The quantum efficiency is 48.90%, which is larger than that of Dy: CaGdAlO 4 46 and Dy: YAG 48 .…”

“…The fluorescence lifetime of Dy 3+ : 4 F 9/2 level is 0.316 ms, which is much longer www.nature.com/scientificreports/ than that of Dy: CaGdAlO 4 46 and Dy: LiNbO 3 47 . The quantum efficiency is 48.90%, which is larger than that of Dy: CaGdAlO 4 46 and Dy: YAG 48 . The above-mentioned advantages indicate that the 2 at.% Dy: CYA crystal is a potential material for a yellow solid-state laser.…”

Preparation and spectral analysis of 4.3%Dy:YCa4O(BO3)3 and 5%Dy,1.25%Tb:YCa4O(BO3)3 crystals for potential use in solid state yellow lasers

“…11 Xu et al reported that a Dy 3+ : CaGdAlO 4 crystal with an emission cross-section of 5.5 × 10 −21 cm 2 was grown by a floating zone method. 12 In 2012, Bowman S. R. realized a 582.7 nm yellow laser with a maximum output power of 150 mW and a slope efficiency of 12% using a Dy 3+ :YAG crystal. 13 In 2022, Wang et al achieved a 573.9 nm yellow laser with a maximum output power of 351 mW and a slope efficiency of 15% using a Dy,Tb: LuLiF 4 .…”