摘要
研究了用激光加热基座(LHPG)法从粉末压制成型的源棒直接生长单晶光纤的规律。通过显微镜观察直径波动及通过对吸收谱、荧光谱的测试来判断单晶光纤的品质。实验发现,长出较好的单晶光纤需二次生长,先用较快的提拉速度将粉末压制棒生长成陶瓷多晶棒,随后从多晶棒生长出单晶光纤。但其最佳生长速度远比以单晶为源棒生长单晶光纤的速度小(从1.2mm/min 减小到0.2mm/min)。实验还发现,以多晶为源棒所对应的熔区形状系数 C 比以单晶为源棒的小;另外,该法生长的单晶光纤的光谱性能与大块晶体的光谱性能相同。
The growth of single crystal fiber (SCF) from sintered powder rod and polycry-stal rod by LHPG method is studied.SCF of good quality can be grown from the polycrystalrod,but the growth speed should be smaller than that from single crystal rod,and the bestspeeds are 0.2mm/min and 1.2mm/min respectively for the same constitution (lat.% Nd:YAG).The optimum coefficient of molten zone shape for polycrystal source rod is smallerthan that for crystal source rod.and it is proved that this is an efficient,economical andpractical way to the search for new crystal materials.
出处
《人工晶体学报》
EI
CAS
CSCD
1993年第4期336-340,共5页
Journal of Synthetic Crystals
基金
国家自然科学基金
关键词
激光加热基座
陶瓷多晶棒
单晶光纤
LHPG method
polycrystal rod
Nd:YAG single crystal fiber
pulling speed
optical quality
