为了明确高速气流对C/SiC复合材料激光烧蚀行为的影响机制，开展了不同环境下强激光对C/SiC复合材料的烧蚀对比实验研究。利用激光器与高速风洞联合实验平台，完成了静态以及Ma 1.8，Ma 3.0，Ma 6.0气流环境下2D与3DN C/SiC复合材料激光烧蚀实验。结果表明，与静态环境相比，高速气流对C/SiC复合材料的激光烧蚀行为产生了显著的影响，气流的冲刷使得烧蚀坑呈现出更宽、更深、更光滑的变化趋势。随着气流速度的增长，线烧蚀速率与质量烧蚀速率逐渐增大，主要原因为当地静压降低引起的升华速率增大，以及动压增大引起的剥蚀速率增大。此外，通过实验对比了不同构型对C/SiC激光烧蚀行为的影响。结果表明：2D C/SiC复合材料由于厚度方向更低的导热能力、更低的孔隙率等原因，其在不同环境条件下抗烧蚀能力均强于3DN C/SiC复合材料。

概述了数字微光夜视技术的发展历程，阐述了目前基于数字图像处理技术的主流数字微光探测产品的探测机制和成像特点。介绍且对比了不同应用场合下各类探测器的优势和劣势，分析了数字微光探测技术未来发展方向和主要行业的应用前景。

投影显示技术中光学引擎是重要组成部件，其关键参数（光效、均匀性等）直接影响系统的最终性能指标。研究采用发光二极管作为照明光源，菲涅尔透镜作为匀光器件，设计了高光效、高均匀的照明光路，为后续的研究提供了参考。

Integrated spectrometers with both wide optical bandwidths and high spectral resolutions are required in applications such as spectral domain optical coherence tomography (SD-OCT). Here we propose a compact integrated scanning spectrometer by using a tunable micro-ring resonator (MRR) integrated with a single arrayed waveguide grating for operation in the 1265–1335-nm range. The spectral resolution of the spectrometer is determined by the quality factor of the MRR, and the optical bandwidth is defined by the free spectral range of the arrayed waveguide grating. The spectrometer is integrated with on-chip germanium photodetectors, which enable direct electrical readout. A 70-nm optical bandwidth and a 0.2-nm channel spacing enabled by scanning the MRR across one free spectral range are demonstrated, which offer a total of 350 wavelength channels with 31-kHz wavelength scanning speed. The integrated spectrometer is applied to measure different spectra and the interference signals from an SD-OCT system, which shows its great potential for future applications in sensing and imaging systems.

Atom–light interface is at the core of quantum metrology and quantum information science. Associated noises during interaction processes are always inevitable and adverse. In this paper, we perform the stimulated Raman scattering (SRS) in a hot Rb87 vapor cell and demonstrate the reduction of related noises originated from mode mismatch via optimizing the temporal waveform of the input seed. By using the seed with the optimized mode, the intensity fluctuation of the signal field generated in atom–light interaction is decreased by 4.3 dB. Furthermore, the fluctuation of the intensity difference between the signal and atomic spin wave is reduced by 3.1 dB. Such a temporal mode-cleaning method can be applied to improve the precision of atom interferometry using SRS and should be helpful for quantum information processing based on an atom–light correlated system.