针对基于强光元件高精度面形在位检测需求，开展了面形测量误差敏感因素仿真分析，进行了系统结构误差和温度误差对测量结果的影响研究，分析各类误差对测量面形误差的具体影响，设计并搭建在位检测系统，开展系统温度变化、系统重复性、系统稳定性等测量实验。研究结果表明：所建立的逆向哈特曼仿真检测模型可用于平面、球面、非球面、自由曲面等各类型被测面，各类影响因素对测量结果的影响主要体现在低频误差上，对高频误差的影响相对较小，搭建的在位检测系统6 h内测量面形误差PV值最大不超过68 nm（约λ/10），RMS值最大不超过15 nm（约λ/40）。

从极少量的测量值中有效且高概率高质量恢复出原始信号是压缩感知图像重建研究的核心问题，学者们相继提出了传统和基于深度学习的压缩感知图像重建算法，传统算法通常基于优化模型迭代求解，重建质量和重建速度都无法保证；基于深度学习的算法重建质量相对较高，但缺乏物理可解释性。受滤波流的启发，本文提出了联合全局与局部的深度压缩感知图像重建模型（G2LNet），其以卷积层执行压缩采样以及初始重建过程，利用快速傅里叶卷积与滤波流，同时考虑了图像全局上下文信息和图像像素局部邻域信息，联合学习优化测量矩阵与滤波流，建立了完整的端到端可训练的深度图像压缩感知重建网络。经实验验证，在压缩感知图像重建领域常用的Set5，Set11，BSD68测试集上取得了良好的重建效果，在采样率为20%的情况下，G2LNet的图像重建质量相比于经典的传统算法MH与基于深度学习的算法CSNet的平均PSNR分别提高了2.29 dB，0.51 dB，有效提升了重建图像质量。

Raman fiber lasers (RFLs) have broadband tunability due to cascaded stimulated Raman scattering, providing extensive degrees of freedom for spectral manipulation. However, the spectral diversity of RFLs depends mainly on the wavelength flexibility of the pump, which limits the application of RFLs. Here, a spectrally programmable RFL is developed based on two-dimensional spatial-to-spectral mapping of light in multimode fibers (MMFs). Using an intracavity wavefront shaping method combined with genetic algorithm optimization, we launch light with a selected wavelength(s) at MMF output into the active part of the laser for amplification. In contrast, the light of undesired wavelengths is blocked. We demonstrate spectral shaping of the high-order RFL, including a continuously tunable single wavelength and multiple wavelengths with a designed spectral shape. Due to the simultaneous control of different wavelength regions, each order of Raman Stokes light allows flexible and independent spectral manipulation. Our research exploits light manipulation in a fiber platform with multi-eigenmodes and nonlinear gain, mapping spatial control to the spectral domain and extending linear light control in MMFs to active light emission, which is of great significance for applications of RFLs in optical imaging, sensing, and spectroscopy.

针对现有小尺寸集群损伤修复及检测技术仍不完善的问题，重点研究亚表面缺陷多模态原位检测方法，从损伤样件表面损伤数量和尺寸、典型小尺寸损伤的形貌、光热吸收、荧光面积等多项指标进行了系统测量和分析，并开展了磁流变修复研究。研究结果表明：熔石英小尺寸损伤内部的吸收性杂质是影响元件性能的主要因素，在磁流变缎带接触到损伤底部前，损伤的整体吸收和荧光分布呈上升趋势；高重频激光对磁流变修复后的损伤辐照过程是一个由慢变快、由杂质到本体、由边缘逐渐向外扩张的过程，能够有效对磁流变修复后的表面进一步起到修复作用，可作为组合修复工艺的第三道工序。研究结果对光学元件检测表征体系的构建提供参考。

The recent era of fast optical manipulation and optical devices owe a lot to exciton-polaritons being lighter in mass, faster in speed and stronger in nonlinearity due to hybrid light-matter characteristics. The room temperature existence of polaritons in two dimensional materials opens up new avenues to the design and analysis of all optical devices and has gained the researchers attention. Here, spin-selective optical Stark effect is introduced to form a waveguide effect in uniform community of polaritons, and is used to realize polarization modulation of polaritons. The proposed device basically takes advantage of the spin-sensitive properties of optical Stark effect of polaritons inside the WS₂ microcavity so as to guide different modes and modulate polarization of polaritons. It is shown that polaritonic wavepacket of different mode profiles can be generated by changing intensity of the optical Stark beam and the polarization of polaritons can be controlled and changed periodically along the formed waveguide by introduction birefringence that is sensitive to polarization degree of the optical Stark beam.The recent era of fast optical manipulation and optical devices owe a lot to exciton-polaritons being lighter in mass, faster in speed and stronger in nonlinearity due to hybrid light-matter characteristics. The room temperature existence of polaritons in two dimensional materials opens up new avenues to the design and analysis of all optical devices and has gained the researchers attention. Here, spin-selective optical Stark effect is introduced to form a waveguide effect in uniform community of polaritons, and is used to realize polarization modulation of polaritons. The proposed device basically takes advantage of the spin-sensitive properties of optical Stark effect of polaritons inside the WS₂ microcavity so as to guide different modes and modulate polarization of polaritons. It is shown that polaritonic wavepacket of different mode profiles can be generated by changing intensity of the optical Stark beam and the polarization of polaritons can be controlled and changed periodically along the formed waveguide by introduction birefringence that is sensitive to polarization degree of the optical Stark beam.