铒钇铝石榴石激光晶体的研究

STUDY ON LASER CRYSTAL——YTTRIUM-ERBIUM-ALUMINUM GARNET

研究了引上法生长铒钇铝石榴石的生长工艺。对于不同的铒离子渡度(15—100at.％),获得了直径23—25mm、有效长度100mm以上的优良单晶。测试了与晶体激光行为有关的性能:吸收光谱、荧光光谱和折射率。从铒离子浓度为50at.％的晶体中获得了2.938μm激光。最后讨论了提高激光效率的途径。

Yttrium-erbium-aluminum garnet crystals up to 23—25mm in diameter and 100—120mm long with different Er ion concentrations (15—100at.%) were grown successfully from melt by Czochralski technique in the laboratory. Measurements of optical parameters were made, such as refractive indices, absorption and luminescence spectra of the crystal. Laser of 2.938μm wavelength was obtained with 50% activator concentration. Finally the approach for improving the laser efficiency is also discussed in the paper.