The non-uniform gain of the active media is a significant issue in terms of optimizing the beam profile and ensuring image quality of the laser monitor. In this paper, a study of the radial distribution of radiation in copper bromide brightness amplifiers in real schemes of laser monitors is presented. The radial distribution of radiation in a two-pass parallel beam amplified by a brightness amplifier is compared with the radiation distribution in a beam that carries an image in conventional and mirror-imaging laser monitors. The results demonstrate that for metal vapor gain media operated at low concentration of the working substance vapors, the appropriate choice of imaging optics can partially or completely uniform image intensity profile. In case of remote laser monitoring, the intensity dip at the center of the amplified beam completely disappears in the mirror-imaging laser monitor up to a distance of 2 m from the brightness amplifier. This observation range is sufficient for most tasks in the study of the combustion of energetic materials.

中文翻译：

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真实激光监测方案中 CuBr 蒸气亮度放大器中的时空辐射分布

在优化光束轮廓和确保激光监视器的图像质量方面，有源介质的非均匀增益是一个重要问题。在本文中，研究了激光监视器实际方案中溴化铜亮度放大器中辐射的径向分布。将亮度放大器放大的双通道平行光束中的辐射径向分布与传统和镜像激光监视器中携带图像的光束中的辐射分布进行比较。The results demonstrate that for metal vapor gain media operated at low concentration of the working substance vapors, the appropriate choice of imaging optics can partially or completely uniform image intensity profile. 在远程激光监控的情况下，在距离亮度放大器 2 m 的镜像激光监视器中，放大光束中心的强度下降完全消失。这个观测范围足以满足研究含能材料燃烧的大多数任务。