An energy measurement system in a large-aperture high power laser experiment platform is introduced. The entire measurement system includes five calorimeters, which carry out the energy measurement of the fundamental ...An energy measurement system in a large-aperture high power laser experiment platform is introduced. The entire measurement system includes five calorimeters, which carry out the energy measurement of the fundamental frequency before the frequency conversion unit, remaining fundamental frequency, remaining second-harmonics, third-harmonics,as well as the energy balance measurement after the frequency conversion unit. Combinational indirect calibration and direct calibration are employed to calibrate the sampling coefficients of the calorimeters. The analysis of the data showed that, regarding the energy balance coefficients, combinational calibration approach gives a higher precision, and leads to an energy balance with 1%; and regarding the energy sampling coefficients for the various wavelengths after the frequency conversion, the results from direct and combinational calibration are consistent. The uncertainties for all energy sampling coefficients are within 3%, which guarantees the reliability of the energy measurement for the laser facility.展开更多
In this paper we review the provision of the laser diagnostics that are installed on the Vulcan laser facility. We will present strategies for dealing with the energy of high energy systems and with ways of handling t...In this paper we review the provision of the laser diagnostics that are installed on the Vulcan laser facility. We will present strategies for dealing with the energy of high energy systems and with ways of handling the beam sizes of the lasers. We present data captured during typical experimental campaigns to demonstrate their reliability and variation in shot to shot values.展开更多
激光塑造大气透镜(laser developed atmospheric lens,LDAL)是一种先进的太空监视概念,即利用高能激光在大气层形成类似于透镜的结构,实现敌方目标的有效监视。介绍这种概念的应用需求,详细分析了“激光塑造大气透镜”的产生机制和系统...激光塑造大气透镜(laser developed atmospheric lens,LDAL)是一种先进的太空监视概念,即利用高能激光在大气层形成类似于透镜的结构,实现敌方目标的有效监视。介绍这种概念的应用需求,详细分析了“激光塑造大气透镜”的产生机制和系统结构,深入讨论了其面临的技术挑战,包括大气透镜的形成效应、塑造方式、所需激光功率、机载电力、目标监视时间等,并对相关信息进行了分析。分析结果标明:激光塑造大气透镜是一项颠覆性的新兴技术,可能会改变未来的战场感知态势,在实现上需要高功率激光器的小型化、巨大的机载电力、高速摄影、自适应光学以及高精度成像等技术的综合支持。展开更多
基金supported by the National Natural Science Foundation of China(No.61377102)
文摘An energy measurement system in a large-aperture high power laser experiment platform is introduced. The entire measurement system includes five calorimeters, which carry out the energy measurement of the fundamental frequency before the frequency conversion unit, remaining fundamental frequency, remaining second-harmonics, third-harmonics,as well as the energy balance measurement after the frequency conversion unit. Combinational indirect calibration and direct calibration are employed to calibrate the sampling coefficients of the calorimeters. The analysis of the data showed that, regarding the energy balance coefficients, combinational calibration approach gives a higher precision, and leads to an energy balance with 1%; and regarding the energy sampling coefficients for the various wavelengths after the frequency conversion, the results from direct and combinational calibration are consistent. The uncertainties for all energy sampling coefficients are within 3%, which guarantees the reliability of the energy measurement for the laser facility.
文摘In this paper we review the provision of the laser diagnostics that are installed on the Vulcan laser facility. We will present strategies for dealing with the energy of high energy systems and with ways of handling the beam sizes of the lasers. We present data captured during typical experimental campaigns to demonstrate their reliability and variation in shot to shot values.
文摘激光塑造大气透镜(laser developed atmospheric lens,LDAL)是一种先进的太空监视概念,即利用高能激光在大气层形成类似于透镜的结构,实现敌方目标的有效监视。介绍这种概念的应用需求,详细分析了“激光塑造大气透镜”的产生机制和系统结构,深入讨论了其面临的技术挑战,包括大气透镜的形成效应、塑造方式、所需激光功率、机载电力、目标监视时间等,并对相关信息进行了分析。分析结果标明:激光塑造大气透镜是一项颠覆性的新兴技术,可能会改变未来的战场感知态势,在实现上需要高功率激光器的小型化、巨大的机载电力、高速摄影、自适应光学以及高精度成像等技术的综合支持。
