Understanding the radiation model of a flash lamp is essential for the reflector design of a laser amplifier. Reflector design often involves several simplifying assumptions, like a point or Lambertian source; either ...Understanding the radiation model of a flash lamp is essential for the reflector design of a laser amplifier. Reflector design often involves several simplifying assumptions, like a point or Lambertian source; either of these assumptions may lead to significant errors in the output distribution. In practice, source non-idealities usually result in sacrificing the amplifier's gain coefficient. We propose a novel test technique for attaining the xenon flash lamp absolute spectral intensity at various angles of view, and then accurately predict radiation distributions and generate the reflector shape. It is shown that due to the absorption of emitted radiation by the lamp itself, the behavior of the radiation model at various wavelengths is different. Numerical results of xenon plasma absorption coefficient were compared with the measured data. A reasonable agreement was obtained for the absorption coefficient parameters. Thus, this work provides a useful analytical tool for the engineering design of laser amplifier reflectors using xenon flash lamps as pumps.展开更多
为了提高调节脉冲氙灯的效率,研究了脉冲氙灯电流峰值与电容初始电压之间的关系,并在此基础上量化分析了脉冲氙灯参数对电流峰值的影响。实验分组分别测量了具有不同充气气压、电极间距以及灯管内径等参数的脉冲氙灯工作在不同电容初始...为了提高调节脉冲氙灯的效率,研究了脉冲氙灯电流峰值与电容初始电压之间的关系,并在此基础上量化分析了脉冲氙灯参数对电流峰值的影响。实验分组分别测量了具有不同充气气压、电极间距以及灯管内径等参数的脉冲氙灯工作在不同电容初始电压条件下的电流峰值。实验发现,电容初始电压在1.75-4.25 k V范围内,电流峰值与电容充电电压有着良好的线性关系。对此进行了线性函数模拟,得到模拟结果与实验测量结果的相对误差〈5%。通过计算分析充气气压、电极间距以及内径等条件与模拟线性函数斜率的关系,验证了所得结果的正确性以及研究方法的合理性,为脉冲氙灯电流峰值的研究提供了一种新的方法。同时发现灯管内径对脉冲氙灯电流峰值影响十分强烈,充气气压对电流峰值影响相对较弱。这些现象对于新型脉冲氙灯的研制、选用及调试都有参考意义。展开更多
基金Grants fromthe Chinese and Israeli cooperation project on high-power laser technology(2010DFB70490)supported this study
文摘Understanding the radiation model of a flash lamp is essential for the reflector design of a laser amplifier. Reflector design often involves several simplifying assumptions, like a point or Lambertian source; either of these assumptions may lead to significant errors in the output distribution. In practice, source non-idealities usually result in sacrificing the amplifier's gain coefficient. We propose a novel test technique for attaining the xenon flash lamp absolute spectral intensity at various angles of view, and then accurately predict radiation distributions and generate the reflector shape. It is shown that due to the absorption of emitted radiation by the lamp itself, the behavior of the radiation model at various wavelengths is different. Numerical results of xenon plasma absorption coefficient were compared with the measured data. A reasonable agreement was obtained for the absorption coefficient parameters. Thus, this work provides a useful analytical tool for the engineering design of laser amplifier reflectors using xenon flash lamps as pumps.
文摘为了提高调节脉冲氙灯的效率,研究了脉冲氙灯电流峰值与电容初始电压之间的关系,并在此基础上量化分析了脉冲氙灯参数对电流峰值的影响。实验分组分别测量了具有不同充气气压、电极间距以及灯管内径等参数的脉冲氙灯工作在不同电容初始电压条件下的电流峰值。实验发现,电容初始电压在1.75-4.25 k V范围内,电流峰值与电容充电电压有着良好的线性关系。对此进行了线性函数模拟,得到模拟结果与实验测量结果的相对误差〈5%。通过计算分析充气气压、电极间距以及内径等条件与模拟线性函数斜率的关系,验证了所得结果的正确性以及研究方法的合理性,为脉冲氙灯电流峰值的研究提供了一种新的方法。同时发现灯管内径对脉冲氙灯电流峰值影响十分强烈,充气气压对电流峰值影响相对较弱。这些现象对于新型脉冲氙灯的研制、选用及调试都有参考意义。
