空间激光干涉测距系统对望远镜的光程稳定性提出了皮米级的要求。为了测量望远镜光程稳定性，基于法布里-珀罗（F-P）干涉仪设计了望远镜光程稳定性测量方案。介绍了基于PDH（Pound-Drever-Hall）锁频技术将望远镜腔内的光程长度变化转为激光频率变化的测量原理。根据已有的实验数据分析了在光程稳定性测量公式中对稳定性测量结果有影响的物理量，并对测量方案中各部件引入的外部噪声进行测量和分析。实验结果表明：光程稳定性测量公式中绝对激光频率测量误差和望远镜腔自由光谱范围测量误差对望远镜皮米级光程稳定性测量的影响非常小，影响量分别为7.1×10^-9 pm/Hz^1/2和5.0×10^-3 pm/Hz^1/2。在1~100 mHz频段内，与测量方案中电子噪声、拍频测量噪声和剩余幅度调制噪声等效的光程噪声分别为0.14、0.01、3.57 pm/Hz^1/2。为实现望远镜的皮米级光程稳定性测量，需要进一步开展抑制剩余幅度调制噪声方面的研究工作。

芯片老化引发的可靠性问题日益严重,会降低芯片性能,最终可能导致芯片失效。针对已有的芯片老化测量结构硬件开销大、影响关键路径时序等问题,提出了一种低开销的旁路重构振荡环的片上老化测量方案。实验结果表明,相比现有方案,该方案硬件开销降低了63.2%,在性能上平均提高了15.7%,并且老化在线测量误差较小,仅为2%。

Two automatic measurement methods of bidirectional reflection distribution function (BRDF) are presented based on absolute and relative definition. Measurement principle and scheme of the methods are analyzed. A real-time measurement device is developed, the measurement spectral range of which is from ultraviolet to near infrared with 2.4-nm wavelength resolution, and the angular range is [EQUATION] in azimuth angle and [EQUATION] in zenith angle with [EQUATION] angle resolution. Absolute measurements of BRDF on tinfoil and ceramic tile are performed and the test materials present apparent specular reflection characteristics. The theoretical error in the experiment is about 6.05%. The BRDF measurement results are closely related to the precision of measurement platform, the sensitivity of measurement instrument, and the stability of illuminating light source.

光在受抑全内反射过程中Goos-Hnchen(GH)位移会由于光在第三个区域中的耦合输出而减小。而在镀有电介质膜的受抑全反射结构中,由于光在介质膜内的共振,可使反射光束、透射光束的GH位移得到极大的增强。在共振点上,光疏介质内的衰减场强也会得到增强。为了测量增强的衰减场,可采用具有耦合输出的类似于受抑全内反射的结构。研究表明,在此结构中反射光束和透射光束GH位移与入射角大小及薄膜厚度有关,当空气层达到一定厚度时,反射光束的位移等于透射光束位移的两倍。