论文部分内容阅读
百ps紫外超短脉冲在冲击点火实验中起重要的作用。本实验采用倍频晶体与和频晶体I/I类相位匹配的方式对脉宽为300 ps的红外超短脉冲激光进行了三倍频,三倍频信号用条纹相机进行测量,结果如图1所示,脉宽为200 ps。采用放电泵浦KrF准分子放大器LLG50进行了前端放大,采用电子束泵浦KrF准分子激光器放大器进行了二级放大。放大光路如图2所示。百ps紫外超短脉冲经两级放大后,获得的能量大于0.5 J、功率对比度大于108。
One hundred ps ultraviolet ultrashort pulse in the impact ignition experiment plays an important role. In this experiment, the frequency-doubling crystal and crystal I / I phase matching mode of the pulse width of 300 ps infrared ultrashort pulse laser triplicate frequency, triple frequency signal with a streak camera to measure the results shown in Figure 1 As shown, the pulse width is 200 ps. A discharge pump KrF excimer amplifier LLG50 was used for front-end amplification, and a second-stage amplification was carried out by using an electron-beam pumping KrF excimer laser amplifier. Amplify the optical path shown in Figure 2. One hundred ps UV ultrashort pulse amplified by two stages, the energy is greater than 0.5 J, power contrast greater than 108.