Growth and spectral properties of Yb,Tm:YAG crystal

Recent progress in advanced optical materials based on gadolinium aluminate garnet (Gd3Al5O12)

“…The most preferred and widely used hosts for UC luminescence are fluorides owing to their low phonon energy, though other material types, such as Y 2 O 3 transparent ceramics [80, 81] and Gd 2 O 2 S powder [82], were also explored. YAG was suggested to possess a large ground-state Stark splitting and has a quasi three-level energy structure, which may enable a broad and intense absorption of Yb 3+ in it [83]. The energy transferred from Yb 3+ may effectively populate the upper level of Tm 3+ in YAG [83].…”

“…YAG was suggested to possess a large ground-state Stark splitting and has a quasi three-level energy structure, which may enable a broad and intense absorption of Yb 3+ in it [83]. The energy transferred from Yb 3+ may effectively populate the upper level of Tm 3+ in YAG [83]. UC performances were recently studied for stabilized GAG with the compositions of [(Gd 1- x Lu x ) 0.948 Yb 0.05 Ln 0.002 ]AG ( x = 0.1–0.5, Ln = Er, Ho, and Tm) [53, 84, 85].…”

Spectral properties of Tm3+-doped LiLa(MoO4)2 crystal

“…To obtain the ∼2.0 m laser, Tm 3+ -doped media become very promising because the 3 F 4 → 3 H 6 transition of Tm 3+ ions is an effective channel [4] and the broad emission band of the transition also makes tunable laser operation possible [5]. In addition, the broad and strong absorption band of the 3 H 6 → 3 H 4 transition around 795 nm is suitable for the AlGaAs diode laser pumping [6].…”

Phase evolution, structure, and up‐/down‐conversion luminescence of Li6CaLa2Nb2O12:Yb3+/RE3+ phosphors (RE = Ho, Er, Tm)

“…For example, RE 3+ activated yttrium aluminate garnet (Y 3 Al 5 O 12 , YAG), LuAG, and TbAG are finding irreplaceable applications in solid lasers, Faraday isolators, high‐energy scintillators, and white‐light emitting LEDs . The garnet structure was also suggested to be desirable for UC luminescence, since in which the Yb 3+ sensitizer may present large ground‐state Stark splitting to form a quasi‐three energy level, which was expected to be able to enhance absorption of the NIR excitation energy and to improve the efficiency of energy transfer from Yb 3+ to RE 3+ for better luminescence . In practice, intense green UC emission from Ca 3 (Sc 2 Si 3 )O 12 :Yb/Tb, strong white emission from Lu 3 Ga 5 O 12 :Tm/Yb/Er, intense NIR Stokes and blue anti‐Stokes emissions from Lu 3 Ga 5 O 12 :Yb/Tm, dominantly strong red emission from (Gd 1‐ x Lu x )AG:Yb/Ho ( x = 0.1‐0.5), green and red luminescence from YAG:Yb/Er, and absolutely strong NIR emission from Ca 3 Ga 2 Ge 3 O 12 :Cr/Yb/Tm garnets have been reported.…”