Large sized neodymium-doped Y3Al5O12(Nd:YAG)laser crystals have been grown by temperature gradient technique(TGT)method and compared with Czochralski(Cz)method. The comparison of these two crystal growth methods has been listed. The results showed that the TGT method has many advantages over the Cz method. The concentration distribution of Nd ions in the crystals was determined and the absorption spectra of these crystals have been investigated and compared. The TGT grown highly doped Nd:YAG crystal has a larger absorption FWHM than that of Cz grown Nd:YAG crysral. Highly doped Nd:YAG(～2.8 at. pct)crystals could be obtained by TGT.
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