Abstract A floating zone furnace is a powerful tool for single crystal growth. Here, we report the floating zone furnace using a high power diode laser of 1 kW composed of five 200 W heating beams. The five beams with the designed irradiation intensity distribution enable the melt-growth of single crystals for refractory materials having a high melting temperature above 2000 °C, volatile materials and even incongruent materials. The power of five beams in the horizontal plane provides uniform intensity in the outer circumference of the raw material rods, while the vertical direction power of five beams can be made to have a bell shape irradiation intensity so as to relax residual thermal stress in the grown single crystal. The present furnace enables one to directly monitor the temperature of the hot spot of raw material and the molten zone within a 1 mm diameter. Such an in-situ monitoring function of the temperature on the molten zone greatly enhances the controllability for optimizing the crystal growth condition.

中文翻译：

---

配备5条智能光束组成的1kW高功率激光器的浮区炉

摘要 浮区炉是单晶生长的有力工具。在这里，我们报告了使用由五个 200 W 加热光束组成的 1 kW 高功率二极管激光器的浮区炉。具有设计的辐照强度分布的五束光束能够实现单晶的熔融生长，用于具有高于2000°C的高熔化温度的耐火材料、挥发性材料甚至不协调的材料。水平面五束光的功率使原料棒外周强度均匀，而垂直方向五束光的照射强度可达到钟形辐照强度，以缓和生长中的残余热应力。单晶。本炉可以直接监测1mm直径范围内的原料热点和熔融区的温度。这种熔区温度的原位监测功能大大增强了优化晶体生长条件的可控性。