【作者】 李文雪； 梁敏； 胡婉约； 丁良恩； 章佶； 丁晶新； 孙真荣；

【Author】 Li Wenxue, Liang Min, Hu Wanyue, and Ding Liangen Zhang Ji, Ding Jingxin and Sun Zhenrong Key Laboratory of Optical and Magnetic Resonance Spectroscopy, Ministry of Education of China, and Department of Physics ,East China Normal University, Shanghai 200062 , China

【机构】 华东师范大学光谱学与波谱学教育部重点实验室物理系；

【摘要】 目前我们正从事近衍射极限光束的高能量飞秒激光系统的设计及其性能研究．本系统设计指标为在10Hz重复速率下脉冲功率达到5TW, 可应用于超强领域的物理实验研究．我们在传统的啁啾脉冲放大系统基础上加以改进,对应用啁啾脉冲放大技术的5TW／40fs超快激光系统中的空间滤波、热透镜效应等关键问题的解决方案进行改进,以便减小在放大阶段所带来的增益变窄、增益转移和热聚焦等有害现象,减小了由于多通放大过程所带来的能量的损失．更多还原

【Abstract】 We have been experimentally studying the design and characterization of a femtosecond high-intensity laser system emitting a near diffraction-limited beam. This system was designed in order to reach 5TW at 10Hz repetition rate. We present the improvements of a conventional chirp pulse amplification configuration in order to decrease the deleterious effects of thermal focusing and spatial degradation in the multipass amplifier stages.更多还原