利用光纤布拉格光栅在触觉传感方面的高灵敏和柔韧性优势，进行了滑触感知和分类训练研究，实现了在线材质识别。通过理论分析，优化光纤光栅封装，搭建了光纤光栅滑触感知平台，并研究其上位机控制方法及材质在线识别分类算法，提取中心波长的均值最大差值、差值、极差特征作为三维特征，应用支持向量机算法进行分类训练。训练结果表明，在5、10、15 cm/s滑移的混合数据集下，对粗布、PLA、砂纸800目的分类准确度达96.6%。相较于其他特征分类法，具有更好的分类能力和适应不同滑移速度的优势。在5~15 cm/s随机滑速的36次（3类材质×3个样品×4次滑移）验证测试中正确识别了34次。研究成果可为智能感知机器人提供一种在线新颖的材质识别方法。

为了同时确定监测结构的位移大小和方向，提出了一种基于光纤光栅组合的大量程、结构简单的机械传感装置。该传感装置以U型不锈钢结构组合光纤光栅为核心传感单元，以杠杆杆件来传递位移，测点位移大小和方向可以通过杠杆杆件两侧的U型不锈钢结构上的光纤光栅波长漂移计算得出。开展了传感装置6组辅助结构（核心传感单元）的标定试验，结果表明所有传感单元均具有较高的线性度，测量范围为0~140 mm，灵敏度为4.362 pm/mm，迟滞性误差为3.25%，重复性误差为6.62%。将传感装置用于室内堆积体边坡模型试验中，研究它们在土体连续滑动变形过程中的监测性能，并与粒子图像测速技术测量的土体位移变化进行比较，两种技术数据上呈现出较好的一致性、吻合度较高，表明所研发的光纤光栅矢量位移测量传感装置能够准确捕获坡面矢量变形，在智能监控领域有广阔的应用前景。

通过优化光纤布拉格光栅形状传感技术中传感点位置和补偿重构结果来提高薄层合金板三维形状重构精度。通过ANSYS workbench建立合金板仿真模型，提取应变和位移模态振型，根据模态置信准则、转换矩阵稳定性和模态振型相似性分别设计了三个目标函数，采用快速和精英机制的多目标遗传算法优化传感器位置。将镍钛合金板弯曲成不同曲率半径的弧形，利用光纤布拉格光栅中心波长漂移量和线性插值算法计算得出不同形状下的结构应变，重构合金板形状，均方根误差和最大误差相较于单目标优化算法分别减小30%和15%。利用粒子群优化径向基函数神经网络算法拟合误差与位移的关系实现误差补偿，均方根误差和最大误差比无补偿时分别减小了90%和70%，最大相对百分比误差仅为5%，提高了三维形状重构算法精度。

为了研制一种微小型、三轴测量的高灵敏度振动传感器，提出一种分立元件交错组合的超紧凑光纤光栅三轴振动传感器设计方法。采用分立元件组合设计方法降低了设计加工难度，与一体化设计对比，分立元件组合结构的零件结构简单、易于加工、结构设计也更为灵活，缩短了传感器结构的优化迭代周期。通过理论模型分析和有限元仿真，优化传感器结构参数，最终封装完成的尺寸为15 mm×15 mm×15 mm，质量约为24.26 g。最后进行实验测试和传感器性能分析。实验结果表明：该传感器的工作频段为0~1 200 Hz，在X、Y、Z轴方向的固有频率分别为1 850 Hz、1 770 Hz和1 860 Hz，三个轴向的灵敏度分别达到77.37 pm/g、80.73 pm/g和75.04 pm/g，横向抗干扰小于5%。该传感器满足航天振动测量轻量化、工作范围和灵敏度的应用需求，在遥感卫星微振动测量等领域具有重要应用前景。

The pandemic of respiratory diseases enlightened people that monitoring respiration has promising prospects in averting many fatalities by tracking the development of diseases. However, the response speed of current optical fiber sensors is still insufficient to meet the requirements of high-frequency respiratory detection during respiratory failure. Here, a scheme for a fast and stable tachypnea monitor is proposed utilizing a water-soluble C₆₀-Lys ion compound as functional material for the tracking of humidity change in the progression of breath. The polarization of C₆₀-Lys can be tuned by the ambient relative humidity change, and an apparent refractive index alteration can be detected due to the small size effect. In our experiments, C₆₀-Lys is conformally and uniformly deposited on the surface of a tilted fiber Bragg grating (TFBG) to fabricate an ultra-fast-response, high-sensitivity, and long-term stable optical fiber humidity sensor. A relative humidity (RH) detecting sensitivity of 0.080 dB/% RH and the equilibrium response time and recovery time of 1.85 s and 1.58 s are observed, respectively. Also, a linear relation is detected between the resonance intensity of the TFBG and the environment RH. In a practical breath monitoring experiment, the instantaneous response time and recovery time are measured as 40 ms and 41 ms, respectively, during a 1.5 Hz fast breath process. Furthermore, an excellent time stability and high repeatability are exhibited in experiments conducted over a range of 7 days.

Aiming for suppressing side-mode and spectrum broadening, a slit beam-shaping method and super-Gaussian apodization processing for femtosecond laser point-by-point (PbP) inscription technology of fiber Bragg gratings (FBGs) are reported here. High-quality FBGs, featuring narrow bandwidth of less than 0.3 nm, high reflectivity above 85%, low insertion loss (0.21 dB), and low cladding loss (0.82 dB), were obtained successfully. By a semi-automatic PbP inscription process, an array consisting of six FBGs, exhibiting almost no side-mode peaks with high suppression ability and narrow bandwidth, was fabricated along three independently developed single-mode fibers with an interval of 20 mm.