Nd:YAG、Cr:Nd:YAG及Ce:Nd:YAG在太阳光泵浦下的光谱匹配研究  

Spectral Matching of Nd:YAG,Cr:Nd:YAG and Ce:Nd:YAG Laser Materials Under Solar Pumping

作　　者：张佳 赵长明[1] 蔡子韬 赵梓寅 Zhang Jia;Zhao Changming;Cai Zitao;Zhao Ziyin(School of Optics and Photonics,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学光电学院,北京100081

出　　处：《中国激光》2023年第13期1-8,共8页Chinese Journal of Lasers

基　　金：国家自然科学基金(61378020,61775018)。

摘　　要：以Nd:YAG、Cr:Nd:YAG和Ce:Nd:YAG三种激光材料为研究对象,采取以空间应用和地面应用为导向的两种太阳光谱模型,计算了太阳辐射光谱与材料吸收光谱之间的重叠效率。将激光材料的吸收系数引入重叠效率,分析了经吸收系数修正后,激光材料的太阳光谱匹配效率随吸收长度的变化关系。当接近光谱匹配效率极限值时,地面太阳光谱模型下Nd:YAG、Cr:Nd:YAG和Ce:Nd:YAG所需要的吸收长度分别为6.5 cm、4.4 cm和3.7 cm,空间太阳光谱模型下所需要的吸收长度分别为7.3 cm、4.3 cm和3.8 cm,所研究的吸收长度为激光材料的长度参数设计提供了可供参考的最大值。同时Ce:Nd:YAG晶体计算出的长度最短,预计泵浦光在该材料中传输时引入的散射损耗将最小,因此以Ce:Nd:YAG晶体作为激光材料,有望进一步提高和改善太阳光泵浦激光器的输出性能。Objective Solar-pumped laser is a device that directly converts sunlight into laser.It has the advantages of reliable system structure,few energy conversion links,and efficient energy transmission from sunlight to laser.Improving the sunlight convergence system,designing an effective pump cavity and finding suitable laser materials are useful to improving the collection efficiency and conversion efficiency of the solar-pumped laser system for sunlight.Sunlight is a wide-spectrum light source,while the bandwidth of the absorption band of the laser material is limited,and the laser materials with different doping ions and ion concentrations have different absorption capacities for sunlight,so the utilization and conversion of sunlight by solar-pumped lasers are limited.Studying the matching of different laser materials with the solar spectrum and the influence of the length of the laser material on the spectral matching is helpful to analyzing the potential of different materials in the solar-pumped laser,and providing a reference for the parameter design of the length of the laser material.In this paper,Nd∶YAG,Cr∶Nd∶YAG and Ce∶Nd∶YAG laser materials widely used in solar-pumped lasers are taken as the research objects.Based on the analysis of their energy level structures,the spectral matching of three laser materials under solar pumping is analyzed by establishing a refined solar spectral model,and their application potential in solar-pumped lasers is discussed.Methods Based on the theory of solar-pumped laser materials,the energy level structures of Nd∶YAG,Cr∶Nd∶YAG and Ce∶Nd∶YAG are analyzed,and the absorption bands of the three laser materials are determined.Then,the solar spectral data models are established by using the space-application-oriented solar spectral irradiance standard AM0 and the ground-application-oriented solar spectral irradiance standard AM1.5 provided by ASTM International.The overlapping efficiency between the solar radiation spectrum and the laser material absorption sp

关 键 词：激光器 固体激光器 激光材料 太阳光泵浦 光谱匹配 

分 类 号：TN244[电子电信—物理电子学]