锥形光纤能够有效兼顾非线性效应抑制和模式控制，具备实现高功率、高光束质量光纤激光的潜力。近期国防科技大学研制了锥形掺镱光纤，采用1018 nm光纤激光后向级联泵浦实现了20.2 kW 激光输出，光束质量β因子平均值优于2，拉曼抑制比为33 dB。研究结果展示了锥形光纤在实现万瓦级高光束质量激光方面的优势。

针对FSO(free space optica)链路和RF(ratio frequency)链路之间通信速率不匹配以及由地面多用户移动所带来的通信服务状态变化问题，提出了无人机自由空间光通信/射频（FSO/RF）混合中继链路传输速率优化方法。以用户公平性、最低服务质量以及无人机总功率为约束，建立了无人机中继协作的FSO/RF混合通信下行链路模型，提出了一种基于无人机动态轨迹和发射功率联合优化算法。利用连续凸逼近及拉格朗日对偶函数法，将原非凸模型转化为凸优化问题进行求解。对不同能见度下链路传输速率进行分析，结果表明，能见度为1.7 km时，FSO链路和RF链路均达到全速传输。所提算法相较固定式中继平均通信速率有了447.5%的提升，相较非功率优化算法链路平均通信速率提升32.5%。

提出一种石墨烯-金属超材料复合太赫兹传感器，充分利用石墨烯能带Dirac点附近费米能级对样品的灵敏响应结合超材料表面强局域电场实现了对谷氨酸溶液浓度的多维超灵敏传感。实验结果表明，传感器在频率f =0.58 THz处存在一个明显的透射峰，且该透射峰幅值随谷氨酸溶液浓度的增加先升高后降低。若以透射峰幅值作为传感指标，器件能够探测到的最低浓度在10⁻¹ fg/mL量级。另外，从传感器的透射波相位差-频率关系曲线中提取的斜率与浓度具有类线性关联，这意味着相位差信息也可以作为有效的传感指标。结合透射幅值和相位差两个传感指标，器件可以实现对谷氨酸溶液浓度的超灵敏精确检测。文中提出的器件为发展基于太赫兹超材料的超灵敏氨基酸传感器提供了帮助。

Ultrashort pulses at 920 nm are a highly desired light source in two-photon microscopy for the efficient excitation of green fluorescence protein. Although Nd^{3 +} -doped fibers have been utilized for 920-nm ultrashort pulse generation, the competitive amplified spontaneous emission (ASE) at 1.06 μm remains a significant challenge in improving their performance. Here, we demonstrate a coordination engineering strategy to tailor the properties of Nd^{3 +} -doped silica glass and fiber. By elevating the covalency between Nd^{3 +} and bonded anions via sulfur incorporation, the fiber gain performance at 920 nm is enhanced, and 1.06-μm ASE intensity is suppressed simultaneously. As a result, the continuous-wave laser efficiencies and signal-to-noise ratio at 920 nm by this fiber are significantly enhanced. Importantly, the stable picosecond pulses at 920 nm are produced by a passive mode-locking technique with a fundamental repetition rate up to 207 MHz, which, to the best of our knowledge, is the highest reported repetition rate realized by Nd^{3 +} -doped silica fibers. The presented strategy enriches the capacity of Nd^{3 +} -doped silica fiber in generating 920-nm ultrashort pulses for application in biophotonics, and it also provides a promising way to tune the properties of rare-earth ion-doped silica glasses and fibers toward ultrafast lasers.