【作者】 李俊；

【导师】 刘景和；

【作者基本信息】 长春理工大学 ， 凝聚态物理， 2004， 硕士

【摘要】 本文对Nd：KGW激光晶体的生长工艺及激光性能进行了研究。首先针对晶体特性设计了合理的温场，选择合适的助熔剂，采用顶部籽晶提拉法(TSSG)和泡生法相结合的方法生长得到尺寸为15mm×15mm×20mm的Nd：KGW晶体。其次，通过XRD分析、X射线荧光光谱分析、热分析和晶体振动光谱对晶体的结构和成分进行了分析。最后，对加工后晶体的激光性能进行了测试。采用激光二极管泵浦，在泵浦功率为900mW时，样品1(5mm×5mm×2mm)输出326mW的1.06μm激光，激光阈值为380mW，光-光转换效率36.2％，斜效率62.7％：样品2(Φ2.6mm×4mm)输出305mW的1.06μm激光，激光阈值为380mW，光-光转换效率33.8％，斜效率57.8％。更多还原

【Abstract】 This thesis studies on the growth and laser performance of Nd.KGW crystal. Firstly, according to the characteristics of Nd:KGW laser crystal, design a reasonable temperature field and choose a suitable flux. Nd:KGW crystals have been grown by TSSG method conbined with Kyropoulos method. The crystal dimension is up to 15mm × 15mm × 20mm.Secondly, the structure and the characteristics were analyzed by X-ray diffraction, TG-DAT, infrared spectrum and Raman spectrum. Lastly, the laser performance of the Nd:KGW crystal was tested. The maximum laser output of a 5mm × 5mm × 2mm Nd:KGW microchip was 326mW at wavelength 1.06p.m, when it was pumped by a laser diode of 900mW. The slope efficiency and light-to-light conversion efficiency were 62.7% and 36.2% respectively. The laser threshold was 380mW. The maximum laser output of a Φ2.6mm × 4mm Nd:KGW rod was 305mW at wavelength 1.06μm, when it was pumped by a laser diode of 900mW. The slope efficiency and light-to-light conversion efficiency were 57.8% and 33.8% respectively. The laser threshold was 380mW.更多还原