Abstract: The Nd3+ and Nb5+ doped KTP(KTNNP) crystals with different dopant concentrations have been grown in high temperature solutions.The lattice parameter of the crystals have been determined by X-ray diffractometer,and the concentrations of the dopants in the crystals have been measured systematically by ICP-AES.The result of the experiments shows that the growth habit and the morphology of KTP crystal have changed greatly and the distribution coefficient of Nd3+ has increased obviously after the doping of Nd3+ and Nb5+ in the crystal growth system,the latter incarnates the cooperation effect of Nb5+ on Nd3+.Otherwise,the volume of the crystal unit cell increase slightly with no regularity after doping.

Key words: The Nd3+ and Nb5+ doped KTP(KTNNP) crystals with different dopant concentrations have been grown in high temperature solutions.The lattice parameter of the crystals have been determined by X-ray diffractometer,and the concentrations of the dopants in the crystals have been measured systematically by ICP-AES.The result of the experiments shows that the growth habit and the morphology of KTP crystal have changed greatly and the distribution coefficient of Nd3+ has increased obviously after the doping of Nd3+ and Nb5+ in the crystal growth system,the latter incarnates the cooperation effect of Nb5+ on Nd3+.Otherwise,the volume of the crystal unit cell increase slightly with no regularity after doping.