Spectroscopic properties and laser performance of Tm:YAG ceramics

Effect of Tm2O3 doping on microstructure and optical properties of Tm:YAG ceramics

“…As can be expected shorter times were obtained for samples with a higher Tm 3 þ concentration. Literature data concerning monocrystals and ceramics indicate that metastable level 3 F 4 has a lifetime of the order of 10 ms [32,38]. Our results are similar to earlier data.…”

“…Several research works have been devoted to fabrication and optical properties of transparent thulium doped yttrium aluminum garnet (Tm:YAG) ceramics [30][31][32][33]. The polycrystalline materials manufactured and analyzed within the framework of that works combine the advantages of monocrystals and glass.…”

Highly efficient resonantly pumped 2000 nm Tm:YAG ceramic laser

“…9 The highest lasing efficiency of 65% with a maximum output power of 6.05 W at 2016 nm was achieved by laser diode. Tm:YAG ceramic has a maximum emission cross section of 2.9 × 10 −21 cm 2 at 2012 nm, 11 while emission cross section is ∼1.5 × 10 −21 cm 2 at 2000 nm wavelength. However, for the application of environmental atmosphere monitoring, the 2000 nm laser is more competitive than lasing at 2015 nm because the absorption band of N 2 O at 2000 nm is 10 times stronger than at 2015nm.…”

“…10 The free-running Tm:YAG lasers always emit at the wavelength of ∼2015 nm. 11 Therefore, it is difficult to achieve the 2000 nm laser under the condition of free running. 2 However, a few researchers study the Tm:YAG laser performances at ∼2000 nm, which is attributed to its unsatisfactory gain characteristics around 2 μm region.…”

Er:YAG polycrystalline ceramics: The effects of the particle size distribution on the structural and optical properties

“…Selecting the proper powders, controlling their characteristics and using the appropriate sintering methodology contribute 3 to producing ceramics with high density and transmittance, pore-free microstructures and clean grain boundaries. For this reason, many publications related to laser ceramics have focused on selection of the starting powders or their synthesis [12], development of methods [13,14] and ceramic sintering processes [15,16], analysis of doping mechanisms [17,18], the function of the sintering additives [19,20] and optical properties [21,22]. However, the effects of the particle size distribution (PSD) of the starting powders and its influence on the microstructure and optical properties of RE:YAG polycrystalline ceramics obtained by SSR sintering have rarely been addressed, despite the importance of PSD has and previously published studies regarding this subject [23][24][25][26][27][28][29][30][31][32][33].…”