论文部分内容阅读
本文进行了Yb3+ ∶FAP与Yb3+ ∶YAG的对比分析 ,指出了在激光核聚变领域中Yb3+ ∶FAP是很有希望的增益介质 ,针对Yb3+ ∶FAP吸收光谱宽度很小 (4nm)对泵浦源要求苛刻 ,采用Yb3+ ∶CS FAP即以部分Sr2 + 代替Ca2 + 造成Yb3+ 周围环境多样性增加、增加谱宽。参考分析了Ca3(PO4 ) 2 CaF2 体系的相图 ,推测出生长CS -FAP晶体的配料区间 ,给出了生长晶体的原料制备方法 ,采用氮气流动、白宝石片封闭保温罩的观察孔和观察窗上贴石英片相结合有效地缓解了在晶体生长过程中组分挥发、开裂、以及氟化物腐蚀窗口等一系列问题。生长工艺参数为 :提拉速度 1～ 3mm/h ,旋转速度 10～ 2 0r/min ,在流量为 2 0ml/min的流动N2 中生长 ,采用尺寸为6 0× 4 0mm的Ir坩埚进行生长 ,线圈尺寸为内径130mm× 130mm× 8圈 ,外径155mm× 95mm× 6圈。得到了尺寸为10mm×2 0mm的高质量晶体。用X射线粉末衍射分析证明所生长的晶体结构正确。
In this paper, the comparative analysis of Yb3 +: FAP and Yb3 +: YAG was carried out. It is pointed out that Yb3 +: FAP is a promising gain medium in the field of laser fusion. For Yb3 +: the absorption spectrum of FAP is small (4nm) Harsh, using Yb3 +: CS FAP that is part of Sr2 + instead of Ca2 + Yb3 + caused by the surrounding environment to increase diversity, increase spectral width. Reference to analyze the phase diagram of Ca3 (PO4) 2 CaF2 system, speculate the growing range of CS -FAP crystal ingredients, gives the crystal growth of raw materials preparation method, the use of nitrogen flow, The combination of quartz sheets on the window effectively alleviates a series of problems such as volatilization of components, cracking, and fluoride corrosion windows during crystal growth. The growth parameters were as follows: pulling speed 1 ~ 3mm / h, rotating speed 10 ~ 20r / min, growing in flowing N2 with flow rate 20ml / min and growing with Ir crucible with size of 660 × 4 0mm , The coil size is inner diameter 130mm × 130mm × 8 circles, outer diameter 155mm × 95mm × 6 circles. Get the size of 10mm × 20mm high quality crystal. X-ray powder diffraction analysis confirmed that the crystal structure was grown correctly.