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Growth of 1 inch $LuVO_4$ single crystals by the edge-defined film-fed-growth (EFG) technique
Kochurikhin, V.V.,Klassen, A.V.,Kvyat, E.V.,Ivanov, M.A. The Korea Association of Crystal Growth 2005 한국결정성장학회지 Vol.15 No.6
In suite of their superior optical and laser properties rare-earth orthovanadate single crystals have not been adopted yet into extensive industrial applications because of crystal growth difficulties. The edge-defined film-fed-growth (EFG) technique was applied successfully for the production of such crystals. At first time 1 inch $LuVO_4$ single crystals were grown by the EFG technique using newly developed die construction of high porous iridium with the application of automatic diameter control system.
Crystal growth of yttrium vanadate by the EFG technique
Kochurikhin, V.V.,Ivanov, M.A.,Suh, S.J.,Yoon, D.H. The Korea Association of Crystal Growth 2001 韓國結晶成長學會誌 Vol.11 No.5
The applicability of shaped growth of yttrium orthovanadate was approved by successful growth of rod-like single crystals with the rectangular shape. Nd-doped single crystals with content of $Nd^{3+}$ ions of 1,2,3,5 atomic % in the starting melt were grown by the EFG technique with the size up to $10^{*}10mm$ in section and up to 85 mm in length. For the testing of the multiple growth of the orthovanadates, two and three Nd-and Yb-doped $YVO_{4}$ single crystals were grown by the EFG technique simultaneously up to 110 mm in length.
V.V.Kochurikhin,A.E.Borisova,M.A.Ivanov,서수정,윤대호 한양대학교 세라믹연구소 2003 Journal of Ceramic Processing Research Vol.4 No.3
The applicability of the EFG technique of yttrium orthovanadate was confirmed by successful growth of a few single crystals simultaneously. Yb-doped single crystals with a content of Yb3+ ions of 10 atomic % in the starting melt were grown by the EFG technique with a length up to 50 mm as 4 items simultaneously. Good homogeneity was observed for Yb-doped crystals. The segregation coefficient of Yb3+ ions was very close to unity. Absorption and photoluminescence (PL) spectra of grown crystals were measured. The applicability of the EFG technique of yttrium orthovanadate was confirmed by successful growth of a few single crystals simultaneously. Yb-doped single crystals with a content of Yb3+ ions of 10 atomic % in the starting melt were grown by the EFG technique with a length up to 50 mm as 4 items simultaneously. Good homogeneity was observed for Yb-doped crystals. The segregation coefficient of Yb3+ ions was very close to unity. Absorption and photoluminescence (PL) spectra of grown crystals were measured.
Developed EFG법으로 성장시킨 $YVO_{4}$ 및 Nd:$YVO_{4}$ 단결정의 광학적 특성
허만규,서수정,윤대호,M.A. Ivanov,V.V. Kochurikhin 한국결정성장학회 2001 한국결정성장학회지 Vol.11 No.4
Developed Edge-defined film-fed growth (EFG)법으로 $YVO_{4}$ 및 Nd:$YVO_{4}$ 단결정을 성장하였으며 성장된 결정의 광학적 특성을 측정하였다. $YVO_{4}$ 및 Nd:$YVO_{4}$ 단결정 모두 투명하였으며, 결정성장 동안 융액 표면 온도의 균질 및 meniscus의 안정화로 고품질의 결정을 얻을 수 있었다. 투과 및 흡수 스펙트럼 측정 결과에서 $YVO_{4}$ 단결정은 340 nm에서 1000 nm까지 대체로 넓은 영역에서 높은 투과율이 나타났지만, Nd:$YVO_{4}$ 단결정은 532, 593, 753, 807, 888 nm의 특정한 영역에서 흡수 peak들이 나타남을 획인할 수 있었다. 또한 Photoluminescence (PL) 스펙트럼을 측정한 결과, 800~900 nm의 영역에서 에너지 방출을 관찰할 수 있었다. $YVO_{4}$ and Nd:$YVO_{4}$ single crystals have been grown developed Edge-defined film-fed growth (EFG) method and the crystals were measured on optical properties. $YVO_{4}$ and Nd:$YVO_{4}$ single crystal were transparent, high quality due to homogeneity of surface temperature of the melt and stability of meniscus during crystal growth. In transmittance and absorption spectra, Nd:$YVO_{4}$ single crystals had absorption peaks at wavelengths of 532, 593, 753, 808, 888 though $YVO_{4}$ single crystal had a broad transmittance at wavelength ranging from 340 to 1000nm. Also, Nd:$YVO_{4}$ single crystals had emissions of energy at range of 800~900 nm in photoluminescence (PL) spectrum.