摘要
介绍了一种基于纳米粉末真空烧结技术的新型固体激光材料——Yb:Y2O3多晶陶瓷的制备工艺、物理化学特性、能级结构和光谱特性,并与Yb:YAG单晶进行了对比.采用紧凑型有源镜激光器(CAMIL)的抽运方式,验证了Yb:Y2O3透明陶瓷的激光输出性能.在35W的最大抽运功率下,得到波长1078nm,功率10.5W的连续激光输出,斜率效率达到37.5%.实验中还观察到激光输出波长随抽运功率增加而红移以及随输出耦合镜变化而漂移的现象.Yb:Y2O3多晶陶瓷是一种理想的激光材料,不仅具有与Yb:YAG单晶同样优秀的物理化学性能和光谱特性,而且其热导率和发射带宽约为Yb:YAG单晶的两倍,非常适合于高亮度激光器和超短脉冲激光器领域的发展应用.
A new solid-state laser material Yb：Y2O3 transparent ceramic based on nano crystalline technology and the vacuum sintering （NTVS） method is reported. The manufacture technology, the physical and chemical properties, the energy level split structure and the spectra characteristics of Yb： Y2O3 ceramic media are discussed and compared with those of Yb： YAG single crystal. Further more, with the compact active mirror laser （CAMIL） design, the laser parameters of Yb： Y2O3 ceramic are demonstrated at room temperature. An optimum output power of 10.5 W has been obtained under the max imum pumping power of 35 W. Its corresponding slope efficiency was 37.5%. The laser wavelength red-shift was observed with the increasing of the pump power and the reflectivities while the decrease of the radium of output coupler （ROC）. In fact, Yb： Y2O3 ceramic is an ideal laser material, it has excellent physical and chemical properties and spectra characteristics comparable with those of the Yb：YAG single crystal. Further more, its thermal conductivity and emission bandwidths are nearly twice those of Yb-YAG, which shows that it is a promising candidate in high power and femto-second pulsed laser applications.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第5期2657-2662,共6页
Acta Physica Sinica
