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报道了神光Ⅲ原型激光装置上复杂打靶激光光路条件下的全孔径背反诊断系统。设计了大口径、长焦距菲涅耳透镜,收集激光打靶产生的散射光;采用真空空间滤波的方式,对激光打靶光路终端光学组件中镜片反射的杂散光与需要的非线性效应导致的背反信号进行空间分离。该系统可以同时测量激光等离子体相互作用中产生的受激拉曼散射和受激布里渊散射的光谱分布和散射光能量信息,为激光靶耦合能量平衡精密诊断提供了诊断条件。
This paper reports a full aperture backscattered diagnostic system under the complex laser light path of SG laser prototype. A large diameter and long focal length Fresnel lens is designed to collect the scattered light generated by laser shooting. The vacuum space filtering method is used to detect the backscattered signals caused by the reflected light from the lens and the required nonlinear effect in the optical components of the laser target optical path. Spatial separation. The system can simultaneously measure the spectral distribution and scattered light energy information of stimulated Raman scattering and stimulated Brillouin scattering in the laser plasma interaction, which provides the diagnostic conditions for the precise diagnosis of laser target coupled energy balance.