Optical, luminescent and laser properties of highly transparent ytterbium doped yttrium lanthanum oxide ceramics

Highly transparent Yb-doped (LaxY1−x)2O3 ceramics prepared through colloidal methods of nanoparticles compaction

“…We have observed this band in Yb 3+ :(La x Y 1 − x ) 2 O 3 ceramics before [18] and found it to be caused by Yb 2+ ions absorption. Indeed, a lot of oxygen vacancies are generated in the (La x Y 1 − x ) 2 O 3 matrix during vacuum sintering, and a minute part of Yb 3+ ions reduces to Yb 2+ .…”

“…The green body preparation has been described in detail in [16][17][18]. The density of the green body made of the calcined powder was about 50%.…”

“…All of them are heterovalent and vastly reduce laser efficiency, when the ceramics are to be used as hosts to rare-earth ions. Previous investigations revealed a potential of La 2 O 3 to serve as an isovalent aid to sinter both undoped [13] and doped with ether Nd 3+ [14] or Yb 3+ [15][16][17][18] yttria ceramics.…”

Comparative characteristics of Yb:(YLa)2O3laser ceramics

“…Emission in these wavelength regions is usually associated with cooperative processes of the Yb 3+ ion interaction with other rare-earth ions [26,27]. In particular, cooperative processes between Yb 3+ and Er 3+ ions are believed to be responsible for emission in the regions of 409 [28] and 550 [29,30] nm, as well as in the range 650 - 680 nm [29,31]. The emission in the region of 490 nm is related to the cooperative luminescence of Yb 3+ - Yb 3+ clusters at the doubled Yb 3+ luminescence frequency [32,33] or to cooperative processes between Yb 3+ and Tm 3+ ions [34,35].…”

Synthesis and sintering of nanocrystalline Ce3+ - doped yttria nanoparticles prepared by precipitation method

“…Yttria ceramics have many potential applications such as lighting and display application [1,2], IR windows, laser host material [3,4], and high temperature resistant windows [5]. RE/Yb co-doped Y 2 O 3 transparent ceramics (RE = Er 3+ , Pr 3+ and Tm 3+ ), exhibited very e cient NIR-visible up conversion, therefore the optical properties of Y 2 O 3 ceramics doped with rare earth ions are of special interest for solid state lasers and scintillators [6][7][8][9].…”