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Wei Z.-R.,Hebei University | Wu M.-X.,Hebei University | Guo S.-Q.,Hebei University | Gao P.,Hebei University | And 5 more authors.
Rengong Jingti Xuebao/Journal of Synthetic Crystals | Year: 2010

Using ZnO powder as raw material, HCl and NH3 as transport agent, O2 and H2O vapor as reactant, and proper quantity of HCl as eroding vapor, ZnO crystals along (0002) growth direction were grown on Al2O3 (0001) wafer by Chemical Vapor Transport (CVT) process in an open atmospheric system. The crystals growth speed along a-axis and b-axis are obviously faster than c-axis. The ZnO singe crystal thick film was synthesized when ZnO seed crystal along [0002] direction is used as substrate, the ZnO crystal shows the spiral-shaped epitaxial growth on the substrate, the half-width of rocking curve of positive face is 543.6 arc sec. Source


Chen J.-R.,Beijing Sinoma Research Institute of Synthetic Crystals Co. | Yang C.-H.,Beijing Sinoma Research Institute of Synthetic Crystals Co. | Yuan L.,Beijing Sinoma Research Institute of Synthetic Crystals Co. | Shen D.-Z.,Beijing Sinoma Research Institute of Synthetic Crystals Co.
Rengong Jingti Xuebao/Journal of Synthetic Crystals | Year: 2012

High gray track resistance KTP crystals were grown by the top-seeded solution growth (TSSG) method from the modified flux, and a series of properties such as the transmission spectra, optical homogeneity, phase matching angle and laser induced damage threshold were measured and analyzed. The comparative results between the as-grown HGTR-KTP and normal flux grown KTP crystals indicated that these crystals possess the high gray track resistance ability. No gray track formation was observed in high power frequency doubling. Source


Cui H.-M.,Beijing Sinoma Research Institute of Synthetic Crystals Co. | Teng X.-H.,Beijing Sinoma Research Institute of Synthetic Crystals Co. | Qian X.,Beijing Sinoma Research Institute of Synthetic Crystals Co. | Xiao H.-T.,Beijing Sinoma Research Institute of Synthetic Crystals Co. | Zhang X.,Beijing Sinoma Research Institute of Synthetic Crystals Co.
Rengong Jingti Xuebao/Journal of Synthetic Crystals | Year: 2011

In this paper, microscopic structures and optical properties of chemical vapor desposition(CVD)ZnS/ZnSe before and after heat isostatic press(HIP) were measured and investigated. Experiment shows that the size of grins obviously increased, the defects formed during the growth are minimized, the transmittance of CVD ZnS/ZnSe can be improved dramatically after HIP processing. Source


Wang H.-L.,Beijing Sinoma Research Institute of Synthetic Crystals Co. | Tian T.-Y.,Beijing Sinoma Research Institute of Synthetic Crystals Co. | Wang Z.,Beijing Sinoma Research Institute of Synthetic Crystals Co. | Yuan L.,Beijing Sinoma Research Institute of Synthetic Crystals Co. | Shen D.-Z.,Beijing Sinoma Research Institute of Synthetic Crystals Co.
Rengong Jingti Xuebao/Journal of Synthetic Crystals | Year: 2012

This paper reviews the preparation methods of neodymium doped yttrium aluminum garnet (Nd:YAG) powders and Nd:YAG laser transparent ceramics. The main factors that influencing laser properties of Nd:YAG transparent ceramics are analyzed. Future developing trend of Nd:YAG laser transparent ceramics is previewed. Source

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