提出一种基于同位素原子饱和吸收谱稳频的拉曼激光方案，并应用于原子干涉仪激光系统的小型化。该方案使用同位素原子吸收泡代替现有拉曼光方案中的移频或调制光学器件，以实现拉曼激光的稳频和失谐，使光路和电路同时简化。针对⁸⁵Rb原子干涉仪，⁸⁷Rb原子D₂线的饱和吸收谱被用于对拉曼激光进行稳频，稳频后的拉曼激光红失谐在GHz量级，线宽约为80 kHz。将该拉曼激光用于原子干涉仪获得了对比度为20%的干涉条纹，重力测量的灵敏度为345 μGal/Hz^1/2。连续24 h重力测量数据的阿伦方差显示原子干涉仪的分辨率约为2×10^-8g@7 500 s。该拉曼激光的频率噪声引起的单次重力测量噪声优于1 μGal，完全可以满足μGal量级的重力测量需求。该拉曼激光方案有助于推动原子干涉仪激光系统的小型化、轻量化和实用化。

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.

超快激光加工叶片气膜冷却孔通常在叶片内腔填充防护材料以防对壁损伤。使用中间带防护材料的高温合金夹层试片模拟带防护材料的涡轮叶片，应用在线图像识别技术与控制变量法，研究孔深度、填充半径、斜孔倾角对超快激光填充法加工小孔穿透成形时间的影响，并采用非线性最小二乘法对试验数据进行曲线拟合，结果发现孔深度、填充半径、斜孔倾角与小孔穿透成形时间的关系分别为Gauss函数、Belehradek函数、Boltzmann函数。基于研究结果，提出合理控制填充加工小孔时间并增加旋切加工扩孔的方法，成功获得对壁无损伤而出口成形圆整的小孔。