Fabrication and laser performance of polycrystal and single crystal Nd:YAG by advanced ceramic processing

The effect of silica doping on neodymium diffusion in yttrium aluminum garnet ceramics: implications for sintering mechanisms

“…7. This result is in fair agreement with a previous study 34 which showed that no distinct amorphous film could be identified by TEM imaging of such interfaces. However, the interface seemed to be highly perturbed and from both highresolution electron microscopy (HREM) imaging coupled with EDXS analyses of such interfaces, these authors suggested that silicon segregates at YAG boundaries.…”

Microstructuration induced differences in the thermo-optical and luminescence properties of Nd:YAG fine grain ceramics and crystals

“…3,8 In fact, previous works concerning high resolution characterization of grain boundaries in Nd:YAG ceramics have revealed grain boundaries with a spatial extension of few nanometers leading to negligible photon scattering. 12 ͑ii͒…”

Preparation and characterization of transparent Nd:YAG ceramics

“…Since the advent of high quality ceramic Nd:YAG [1][2][3][4][5] in the end of last century, the tremendous progress in technol− ogy and applications of ceramic materials in laser technol− ogy has been observed up to nowadays . Two types of ceramics processing were successfully demonstrated: l "wet" method developed by Yanagitani and Ueda group [4][5][6][7][8], l "dry" method developed by group of Ikesue and Taira [1][2][3]9].…”

“…Two types of ceramics processing were successfully demonstrated: l "wet" method developed by Yanagitani and Ueda group [4][5][6][7][8], l "dry" method developed by group of Ikesue and Taira [1][2][3]9]. The ceramics made of polycrystalline Y 3 Al 4 O 12 [1][2][3][4][5]14,15,32,33], Lu 3 Al 4 O 12 [13], Y 2 O 3 [6,8,16,18,19,21,22], and Y 3 ScAl 4 O 12 [9] doped with neodymium, ytterbium, chro− mium, and erbium were prepared and showed excellent per− formance in experiments. The optical ceramics can be pro− duced till now from the cubic crystals, however, intensive ef− forts are continued to produce ceramics from anisotropic crystals as vanadates or sapphires.…”

“…The precursor precipitate was obtained by adding a solution of yttrium nitrate into 1.5M ammonium hydrogen carbonate at a speed of 7 ml/min un− der energetic stirring at room temperature. The precipitate was washed repeatedly with deionized water and finally with alcohol to remove the NO 3 -anions. After washing, the resulting product was dried and calcined in air for two hours at a temperature of 1100°C, yielding agglomerated yttria powder.…”