Anisotropy of thermal and spectral characteristics in Tm:YAP laser crystals

Structural Evolutions and Crystal Field Characterizations of Tm-Doped YAlO3: New Theoretical Insights

“…Noticeably, the transitions at 798, 697, 669, 474, and 362 nm are corresponding to the emission lines from 3 H 4 , 3 F 3 , 3 F 2 , 1 G 4 , and 1 D 2 excited states to the 3 H 6 ground state. This assignment is consistent with the result mearsured by Lu et al 63 In addition, the long lifetimes of 3 F 4 and 3 H 5 states indicate a favorable population inversion is easily completed. Transitions from 3 H 5 , 3 H 4 , and 3 F 3 to the ground state are predicated to be good candidates for laser action due to their large branching ratio.…”

Tm3+-doped Gd3Ga5O12 crystal: A potential tunable laser crystal at 2.0μm

“…The full width at half maximum (FWHM) at 684 nm and 787 nm is 4 nm and 11 nm; the corresponding absorption cross-section is 1.34 × 10 −20 cm 2 and 0.27 × 10 −20 cm 2 , respectively. The absorption cross-section of 3 H 6 → 3 H 4 transition is comparable with those of Tm 3+ :YVO 4 : 2.5 × 10 −20 cm 2 [8], Tm 3+ :Y 3 Al 5 O 12 : 0.75 × 10 −20 cm 2 [18], Tm 3+ :YAlO 3 : 0.922 × 10 −20 cm 2 [19].…”

UV–VUV-excited photoluminescence of Tm3+ substituted β-rhenanite as a blue-emitting phosphor

“…The excitation band ranged from 200 to 300 nm could be assigned to the charge transfer band (CTB) of Tm 3 + -O 2 À according to Ref [32]. The sharp peaks at the range of 250-290 nm overlap the CTB, and they could be ascribed to the electron transition from 3 H 6 ground state to 3 P 2 (260 nm), 3 P 1 (274 nm) and 3 P 0 (285 nm) excited state of Tm 3 + , respectively [33].…”