New structural effects in SrMoO₄:Tm³⁺/Ho³⁺crystals

Structural Instability in Single-Crystal Rare-Earth Scandium Borates RESc3(BO3)4

“…It is known that a real composition of compounds, taking into account a deficiency of all crystallographic sites, may differ from a composition of initial charge and, hence, correlations between composition and functional properties will be changed. 16,17 A correct determination of symmetry and structure of huntite family rare-earth scandium borates becomes very important since a possible structural transition from one space group to another can be accompanied by a loss (or acquisition) of the center of symmetry and results in a loss (or acquisition) of nonlinear optical properties in a laser crystal. It was found that the introduction of 5 at.…”

Peculiar Structural Effects in Pure and Doped Functional Single Crystals of Complex Compositions

“…Optically homogeneous SrMoO 4 , both nominally pure and doped with Tm 3+ and Ho 3+ ions, were grown by the Czochralski method (Pt crucible; air atmosphere; SrMoO 4 seed; seed orientation <100>) [95]. Extra pure grade (5 N) SrCO 3 , MoO 3 , Tm 2 O 3 , Ho 2 O 3 , and Nb 2 O 5 powders were used as starting materials.…”

“…The absorption spectra crystals were measured for SrMoO 4 :Tm 3+ at room temperature [95]. The transmission, spectral-luminescence, and excitation spectra were studied for nominally pure Bi 4 Ge 3 O 12 [110], whereas spectral-luminescence and absorption spectra were investigated for BGO:1.0% Dy [120].…”

Growth and spectroscopic properties of Tm3+ doped YPO4 crystal

“…Near-infrared solid state lasers have attracted considerable interest in recent years due to their wide applications in medicine, military, telecommunication, remote sensing and pumping of optical parametric oscillators. [1][2][3][4][5][6] Pumping thulium-doped host media is thought to be a suitable method for obtaining near infrared lasers due to the 3 H 6 → 3 F 4 transition, which can be efficiently pumped by the commercial AlGaAs laser diodes. Several Tm 3+ lasers have been extensively researched thus far in a variety of crystalline host materials, such as Y 3 Al 5 O 12 (YAG), LiYF 4 (YLF), YAlO 3 (YAP), Ln 2 O 3 , YVO 4 , and so on.…”

“…In recent years, doped or co-doped Nd, Yb and Er ions LnPO 4 (Ln = Y and Lu) crystals [18][19][20][21] have been grown and realized the laser output, which means that the rare earth orthophosphates are good candidate laser host materials. However, to the best of our knowledge, the crystal growth and detailed spectroscopic properties of Tm 3+ doped YPO 4 crystal have yet to be reported. However, because of the incongruent melting character, a flux is required during the crystal growth process, and the common fluxes are Pb 2 P 2 O 7 and Li 2 CO 3 -2MoO 3 .…”