高功率激光器在工业应用领域的需求不断增长，提高光-光转化效率是降低其生产制造成本的关键途径。针对提高激光器光-光转化效率所面临的增益介质的热负荷问题，利用锁定波长的969 nm“零声子线”泵浦、自主研制的高性能Yb∶YAG薄片晶体和48冲程泵浦系统等，搭建了高效的连续Yb∶YAG薄片激光器系统，实现了最高输出功率373 W，光-光转化效率可达73.37%。其优异性能为后续开展千瓦级超快Yb∶YAG薄片激光器研究奠定了基础。

在模型实验验证的基础上，采用数值模拟的方法，对比分析了分流喷管出口构型对直升机红外抑制器气动性能、温度场和红外辐射强度的影响。研究结果表明：相比基准分流喷管模型(Origin)，分流喷管出口带一定外扩张角的波瓣出口结构(Lobe_1)的引射系数略微降低、总压恢复系数降低，中间混合管出口排气温度峰值却降低了65.1 K，同时降低了混合管上下方区域的壁面温度，但造成混合管中后段外侧壁面局部区域温度升高；外扩张角为0的波瓣出口结构(Lobe_2)增加引射系数3.8%，总压恢复系数与Lobe_1结构基本相当，中间混合管出口排气温度峰值也降低了62.8 K，尤其是其降低混合管壁面温度的效果最佳；分流喷管出口突片结构(Tab)增加引射系数10.6%，但总压恢复系数降低0.7%，同时，内侧混合管出口排气平均温度降低19.3 K，混合管壁面降温效果相对较差。总体来看，波瓣和突片结构都起到增强引射、强化混合的作用，尤其是波瓣出口结构(Lobe_2)对降低抑制器总体红外辐射效果最好，在3~5 μm波段的红外辐射强度最大可降低21%；在8~14 μm波段，其红外辐射强度最大可降低15%。

A high-power CW Yb:YAG slab laser amplifier with no adaptive optics correction has been experimentally established. At room temperature, the amplifier emits a power of 22 kW with an average beam quality (β) of less than 3 in 0.5 min. To our knowledge, this is the brightest slab laser without closed-loop adaptive optics demonstrated to date. In addition, an extracted power of 17 kW with an optical extraction efficiency of 33%, corresponding to a residual optical path difference of less than 0.5 µm, is achieved with the single Yb:YAG slab gain module. The slab gain module has the potential to be scalable to higher powers while maintaining good beam quality. This makes a high-power solid-state laser system simpler and more robust.

初始磁场电源系统用于激励千特斯拉级内爆磁压缩装置的初级线圈产生初始磁场，是内爆磁压缩装置的关键设备。在分析千特斯拉级内爆磁压缩装置初始磁场电源需求和技术难点的基础上，系统设计了核心部件选择方案和主脉冲电路及控制系统结构，研制成功一套输出电压1～40 kV可调、主放电电流脉冲上升沿约60 μs、总峰值电流达3.2 MA的初始磁场电源系统，已应用于千特斯拉级内爆磁压缩装置动态试验。

目前针对常见爆炸物三硝基甲苯 (TNT) 的检测越来越受到重视。本研究采用低成本的芴基发绿光共轭聚合物（FGEP）研制荧光淬灭传感器用于检测TNT。实验研究了FGEP在不同溶液浓度下形成的不同厚度薄膜对TNT淬灭的效率，实验结果表明浓度为0.5 mg/mL (厚度为19.50 nm) 的样品薄膜在TNT蒸气中淬灭效率最大达到71.71%, 基于此淬灭效率最高的样品薄膜的研究发现：该薄膜对TNT的响应具有良好的可逆性；激发光强度为16.5 mW时，荧光淬灭效率最佳；最后开展了样品在TNT作用下与光漂白作用下的实验研究。研究结果为后续实现一种低成本、易于制备、可重复性高且有利于工程化的爆炸物传感器提供了一定基础。

Mid-spatial frequency wavefront deformation can be deleterious for the operation of high-energy laser systems. When fluid cooled high-repetition-rate amplifiers are used, the coolant flow is likely to induce such detrimental mid-spatial frequency wavefront deformations. Here, we describe the design and performance of a 90 mm × 90 mm aperture, liquid-cooled Nd:phosphate split-slab laser amplifier pumped by flash-lamps. The performance of the system is evaluated in terms of wavefront aberration and gain at repetition rates down to 1 shot per minute. The results show that this single cooled split-slab system exhibits low wavefront distortions in the medium to large period range, compatible with a focus on target, and despite the use of liquid coolant traversed by both pump and amplified wavelengths. This makes it a potential candidate for applications in large high-energy laser facilities.