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本文首次报道了利用倍频方向的籽晶生长GdCa4 O(BO3) 3∶Yb(GdCOB∶Yb)晶体 ,通过控制温场及生长速度可以得到高光学质量的晶体。分析了晶体的生长习性及孪晶的形成。通过与b向生长的晶体相比较 ,认为以倍频方向生长的晶体加工器件时 ,可以极大地提高利用率 (从 50 %提高到 90 % )。测量了晶体的室温透过谱和荧光谱。利用 976nm的激光二极管及列阵二极管作为泵浦源 ,测量了晶体沿最佳倍频方向的激光输出及自倍频性质。
This paper reports for the first time the growth of GdCa4 O (BO3) 3: Yb (GdCOB: Yb) crystals by using a frequency-doubling seed. High optical quality crystals can be obtained by controlling the temperature field and the growth rate. The growth habit and twins formation were analyzed. By comparing with the crystal grown in b direction, it is considered that the crystal growth rate of the crystal growth device (from 50% to 90%) that is grown in a double frequency direction can be greatly improved. The room temperature transmission and fluorescence spectra of the crystals were measured. By using 976nm laser diode and array diode as the pump source, the laser output and self-frequency doubling properties of the crystal along the optimal frequency doubling direction were measured.