摘要
处于3~5μm波段的激光源在遥感、环境保护、医疗、通信和红外对抗等民用和军用领域都有广阔的应用前景。Fe^(2+):ZnSe晶体由于在材料特性和光学特性等方面都具有明显优势,是3~5μm波段极具潜力的激光介质之一。在室温条件下利用自制非链式脉冲HF激光器作为泵浦光源,对晶体直径为10 mm,厚度1 mm,Fe^(2+)离子掺杂浓度为3×1019/cm3的Fe^(2+):ZnSe晶体进行了研究,获得了中心波长4 295 nm、最大输出能量78.8 mJ的中红外激光输出。输出激光能量相对于晶体吸收泵浦能量的转换效率为27.7%,斜率效率达28.8%。采用小角度(3°)斜入射的方案很好地解决了Fe^(2+):ZnSe激光器谐振腔镜镀膜问题。
Lasers in the 3-5μm waveband have many important scientific and military applications such as remote sensing,environmental protection,medical treatment,communication and infrared countermeasures.Fe2+:ZnSe crystal has become one of the most promising materials to generate laser in this region due to its advantages in material and optical properties.The characteristics of a polycrystalline ZnSe sample,which diffusion-doped with Fe2+ions at a concentration of 3×1019/cm3,were investigated.The diameter and the thickness of the sample were 10 mm and 1 mm,respectively.The output characteristics of the Fe2+:ZnSe laser,which was excited by a non-chain electric-discharge pulsed HF laser,were studied at room temperature.A mid-infrared laser with the maximum output energy of 78.8 mJ at a center wavelength of 4 295 nm was obtained.The efficiency respecting to the absorbed pump energy was 27.7%and the slope efficiency was as high as 28.8%.The Fe2+:ZnSe laser was pumped at a small angle(3°)with respect to the optical axis of the laser cavity instead of orthogonal-pump.It solved the problems that a HF laser and a Fe2+:ZnSe laser are both in the mid-infrared band.
作者
孔心怡
柯常军
吴天昊
杭寅
Kong Xinyi;Ke changjun;Wu Tianhao;Hang Yin(Institute of Electronics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China))
出处
《红外与激光工程》
EI
CSCD
北大核心
2018年第10期85-89,共5页
Infrared and Laser Engineering
基金
国家自然科学基金(60708005
61178029
61575198)
