摘要
在对中国工程物理研究院高功率太赫兹(THz)自由电子激光(FEL)装置理论分析和设计的基础上,针对目前THz FEL光腔设计面临的主要难点,提出了椭圆型耦合输出光腔的设计方案,并对椭圆型耦合输出光腔代替传统FEL光腔的优势、光腔品质、耦合效率等进行了分析研究。研究表明,椭圆型耦合光腔的设计更适合目前THz FEL波导光腔的光斑特点,可使光腔输出功率提高33%以上,输出耦合效率即光腔品质可提高30%～70%;随着辐射频率的提高,椭圆孔耦合输出光腔的优势提高更为明显。
The scheme of elliptical hole-coupling optical resonator is proposed instead of circular hole-coupling resonator which is used in THz FEL in order to increase the output power and resonator quality. Three-dimensional simulations and design on elliptical hole-coupling optical resonator are carried out using our 3D OSIFEL code. It is proved that the elliptical hole-coupling optical resonator is effective and applicable for the THz FEL. Using elliptical hole-coupling optical resonator, the output power can be increased by more than 33%, and the coupling efficiency of resonator can be increased almost by 30%-70%. The superiority of elliptical hole-coupling optical resonator will be more prominent with radiation frequency increasing.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2013年第6期1455-1459,共5页
High Power Laser and Particle Beams
基金
国家自然科学基金项目(11105019)
中国工程物理研究院科学技术发展基金项目(2011B0401066)
国家重大科学仪器设备开发和应用专项基金项目(2011YQ1300180102)
关键词
太赫兹
自由电子激光
光腔
耦合设计
terahertz, free-electron laser, optical resonator, coupling design
