铜蒸气激光增益的研究

本文采用振荡-放大装置测量了铜蒸气激光5106谱线的增益和饱和能量密度,它们分别为0.2cm~(-1)和22.3μJcm~(-2).并对实验结果进行了讨论.     

神光-Ⅱ装置三倍频实验中靶场单元技术的改进

 主要介绍为了满足神光-Ⅱ高功率激光装置三倍频光（351nm，3ω）的物理实验要求，靶场三倍频模拟光源和瞄准监视系统两个主要单元技术的改进，即三倍频模拟光源由基频光（1 053nm，3ω）通过腔外的KTP+BBO晶体倍频获得，再经八路分光系统和主激光耦合；瞄准监视系统由透射式光学系统改进为反射式光学系统，避免原系统存在较大的色差，提高瞄准精度。     

高功率激光光束经颗粒污染后的近场衍射效应

采用高功率激光驱动器设计软件Laser designer数值研究了激光光束经颗粒污染后的近场衍射特性. 对颗粒污染所产生的调制进行了分类, 并详细分析了真空和石英玻璃中, 振幅调制型和位相调制型颗粒污染对光束近场的影响. 研究结果表明, 无论在真空或石英玻璃中, 位相型颗粒污染对高功率激光光束的近场调制影响较大. 且在石英玻璃中, 位相型硬边颗粒污染所引起的高功率激光光束小尺度自聚焦热像调制现象相当严重. 而由颗粒污染引起光束强区的横向偏移, 却在一定程度对小尺度自聚焦有抑制作用.     

掺氢改善大口径铜蒸气激光器的输出特性

研究了在大口径铜蒸气激光器（ＣＶＬ）的氖缓冲气体内掺入氢气对激光输出特性的影响。实验表明,掺入微量氢气使输出功率增加２５％,输出光束的空间特性得以改善。     

Approximate formulas of temperature and stress distributions and thermal induced effects in a heat capacity slab laser

Approximate formulas of transient temperature and stress distributions in the slab of a two-side pumped heat capacity laser are attained by solving the heat diffusion equation. Based on the formulas, the distributions of temperature and stress during the pump period of a two-sided symmetrically laser diode array (LDA) pumped Nd:GGG slab laser with 5-kW average output power are numerically simulated. The results show that the temperature in the slab will averagely increase by more than 70 ℃ after operating for 10 seconds; the stress and maximum of the temperature difference in the slab are about 30 MPa and 24 ℃, respectively. The thermal induced effects are discussed also.