Czochralski growth and laser parameters of RE3+-doped Y2O3 and Sc2O3

Growth and characterization of Nd, Yb – yttrium oxide nanopowders obtained by sol‐gel method

“…The temperature of heat treatment has influence on sizes of crystallites and lattice constants of the investigated materials. (2) It was found that the lattice constants of pure Y 2 O 3 and all doped samples treated at higher temperature than 800°C are much lower in comparison to the literature data and chemicals without treatment. It seems that Y 2 O 3 materials after the sol-gel treatment have better structural ordering with less point defects than other initial chemicals (sizes of grain are much greater).…”

“…Yttrium oxide crystallizes in cubic structure of the space group Ia3 and its lattice constant is 10,6041 Å [1]. Furthermore its thermal conductivity is higher than well-known yttrium aluminum garnet (YAG) crystals (Y 2 O 3 -13.6 W/cm; YAG -11.0 W/cm at 30°C) [2] and their thermal expansion coefficient is very similar. Moreover sesquioxide Y 2 O 3 can be doped by rare earth ions and it is a good phosphor used in optical displays light emitting devices.…”

“…The simple sol-gel method is alternative to the growth from the melt which is limited by the high melting temperature and crystal sizes [2,7]. Many techniques have been employed to prepare nanosized yttria doped with lanthanide ions, as for example thermal process [8,9], combustion method [10,11], spray pyrolysis [12], wet chemical synthesis [13].…”

Fabrication and spectral properties of Nd3+-doped yttrium lanthanum oxide transparent ceramics

“…7 shows the room-temperature fluorescence spectrum of 1 , respectively. The strongest emission peak is at 1078 nm wavelength with large stimulated emission cross section of 9.63 Â 10 À20 cm 2 and FWHM of about 7.8 nm. The broad absorption and emission bandwidth of Nd 3+ :Y 1.9 La 0.1 O 3 ceramics are tend to achieve the miniaturized LD pumping apparatus and ultrashort modelocked pulse laser output, respectively.…”

“…But their high melting temperature ($2430°C) and structural phase transition from hexagonal system to cubic system at $2280°C have hindered the use of the conventional growth methods of growing large crystals of high optical quality. Although Y 2 O 3 single crystals doped with rare-earth ions have been grown [1][2][3], no substantial progress in growing the crystals has been made so far, and the laser oscillation results were not satisfied.…”