Effective warm white-light emission with Dy:YAlO3single crystal

Dysprosium-doped orthorhombic yttrium aluminate(Dy:YAlO3or Dy:YAP) single crystals were grown by the Czochralski method with a size of Φ43 mm × 150 mm. Based on the measurements of spectra and theoretical analysis, the white-light emission was investigated with different doping concentrations. The optimal white emission was achieved at Dy³⁺ doping concentration of 1.0% under 450 nm excitation. Combining with residual pumping light, the white-light output was successfully obtained with...     

激光浮区法生长TbYO3晶体

随着高功率固态激光器和光纤激光器的发展，对可见光-近红外区域的光学隔离器要求逐渐增加。目前设备原件正趋于小型化发展，工业应用最广泛的铽镓石榴石(TGG)晶体因其较小的Verdet常数，无法满足未来高功率激光器的需要。Tb₂O₃具有较高的Verdet常数，但是高熔点和相变机制使其难以通过常规提拉法进行单晶生长。本研究通过向Tb₂O₃中掺杂Y₂O₃,研究了不同掺杂浓度下(Tb_xY_1-x)₂O₃的晶体生长。在n(Tb)∶n(Y)=1∶1时，通过激光浮区(LFZ)法生长了TbYO₃单晶，而纯净的Tb₂O₃和(Tb_0.3Y_0.7)₂O₃单晶无法通过该方法合成。TbYO₃晶体具有较高的Verdet常数(445...