采用变形镜影响函数对畸变波前的校正过程进行模拟，并利用超高斯滤波函数对模拟的校正效果进行拟合和统计，确定出变形镜交连值与滤波函数平滑因子的定量关系，进而建立和完善了基于滤波函数的分立变形镜波前校正预估模型。在此基础上，针对具有随机畸变波前的环状光束，对波前校正预估模型的有效性和适应性进行了验证和分析。在实际工作中，只要给定分立变形镜的驱动器间距和变形镜交连值，即可利用给出的超高斯滤波函数波前校正预估模型，从而简便而准确地预估变形镜对不同畸变波前的校正效果。

为了发展性能优良的电光偏转器，采用傍轴近似分析了级联棱镜电光偏转器的折射率梯度等效表达式，总结出了不同几何结构电光偏转器的偏转角和偏转轨迹公式，在此基础上比较研究了4种不同几何结构电光偏转器的偏转特性和偏转轨迹，比较分析了梯形、喇叭形和抛物线形几何结构电光偏转器的偏转灵敏度，为较大角度电光偏转系统的设计提供了有意义的参考。

相干光通信技术是提高接收机灵敏度，发展大容量高码率激光通信系统的重要技术手段，光学桥接器将信号激光和本振激光链接到光电探测器进行相干探测处理，是相干光通信系统的关键器件之一。对近20多年来发展的光学桥接器进行了总结和分类，介绍了不同光学桥接器的原理、构造和性能，分析了光学桥接器的关键技术。

采用CO2激光直写烧蚀加工技术在聚甲基丙烯酸甲酯(PMMA)基片表面加工微通道, 分析了CO2激光输出功率和激光束移动速度对加工质量的影响。选用4.5 W输出功率和76.2 mm/s移动速度, 在30 s内加工了水力直径为100 μm的微通道。在进行微通道的大批量、快速加工时, CO2激光直写烧蚀加工技术具有较高的工艺稳定性, 工艺流程简单, 可随时根据实验需要对微通道结构进行调整和再加工。微通道的激光拉曼光谱与PMMA基片相同, 保证了微通道和盖片对聚合酶链式反应(PCR)物化学影响的一致性。虽然微通道边缘存在少量重铸物, 但不会影响热压键合效果, 芯片能够满足PCR扩增中的压力与密封要求。使用这种芯片实现了180 bp拟南芥脱氧核糖核酸(DNA)片段的PCR扩增, 扩增效果与使用常规PCR仪相当, 验证了采用CO2激光直写烧蚀方法加工PMMA基连续流式PCR微流控芯片的可行性。

Alignment errors of sub-aperture gratings in the optical design of tiled gratings and tiled grating compressors are almost unavoidable. It is important to study the relation between alignment errors and temporal properties of the tiled graing. Analyzed by pulse compression theory, the relation between these alignment errors and focused pulse width broadening is obtained. And the numerical calculation results show that planar alignment errors have much more important influences on the pulse duration, which must be controlled within 21.08 μrad, and the groove-width difference also affects the pulse duration severely, so the ratio between the groove-width difference and groove-width must be controlled within 10-5. From the point of view of eliminating angular dispersion, the planar tilt errors and groove parallelism can ompensate each other, and the groove-width difference and planar errors of tip can also compensate each other.

Introducing the tip-tilt and piston error as the parameter and defining the aperture function of the tiled-grating, far-field property was analyzed with Gaussian beam incidence using the theory of Fourier angular spectrum. The results showed that the output beam was Gaussian while the center of the envelope shifted, the shift magnitude was determined by angle errors and beam size. The phase difference caused by piston error translated with the tiled-grating compressor, the focal spot was affected by both non-integral number of grating space and out-of-plane piston error. Numerical simulation showed the effect on the spatial characteristic of the tiled-grating compressor due to alignment errors.

引入角度偏差、位移偏差作为拼接光栅系统的物理参数，定义了拼接光栅的孔径函数，利用傅里叶角谱理论研究了高斯脉冲入射拼接光栅压缩器后的远场分布特性。研究表明；出射脉冲仍然是高斯型脉冲，但包络中心发生偏移，偏移量由角度偏差量和光束口径决定；位移偏差引入的相位随着拼接光栅压缩器传递，其对远场焦斑的影响，取决于每片子光栅的非整数倍光栅常数的横向位移偏差和纵向位移偏差的综合作用。通过数值计算得到了各维偏差对阵列光栅压缩器空域特性的影响，计算表明：光栅面外角度偏差（俯仰左右）和条纹平行度偏差都必须控制在1μrad以内，在此范围内，应将位移偏差控制在52nm以内。

Multi-kilojoule petawatt lasers using chirped-pulse amplification need large-scale compression gratings. Tiled-grating approach has been adopted in several systems to meet the size requirements, grating tiles need to be precisely phased to ensure a transform-limited focal spot when focusing high-energy laser pulses in the target. Piston error of segmented gratings induced the focal spot to split when it arrived at multiple of the half wavelength. Alignment method using ultra-short pulse capable of controlling the absolute piston phase error within one half wavelength is proposed.

在拼接光栅和拼接光栅压缩器的设计中,子光栅调节偏差不可避免,各维偏差与拼接光栅的时间特性之间的关系很关键。通过脉冲压缩理论分析得到各维偏差和聚焦脉冲时间宽度展宽之间的解析关系,从数值计算结果分析,面平行左右偏差对脉冲的时间宽度影响较大,必须控制在21.08 μrad内；条纹密度差异对脉冲宽度的影响很显著,相对条纹密度的比值应控制在10-5以内；从消除角色散的角度分析,面平行俯仰偏差和条纹平行度偏差可以相互补偿,条纹密度差异和面平行左右偏差也可以相互补偿。

Grating tiling technology using small aperture multilayer dielectric coating diffraction gratings to form large-aperture high-damage threshold gratings is the key technology to solve the output energy of the PW laser system. There are errors of five degrees of freedom between each adjacent pair of gratings within a tiled-grating system, affecting the spatial and temporal property of the laser beam. The authors express the relationship of far-field intensity distribution as the function of individual error by analyzing the effect of tiling gratings errors on the laser beam spatial distribution with Fraunhofer diffraction method and simulate it with numerical method. The results indicate the distortion in the pulse shape caused by angle error is negligible, the piston errors including in-plane shift and out-of-plane shift errors are the critical effects on the far-field intensity distribution.