提出了一种能够实现任意滤波形状的高分辨率可重构微波光子滤波器方案。利用可编程光滤波器完成抽头系数的独立灵活配置，配合使用相干探测技术实现滤波器的正负抽头，从而可以完成滤波形状的任意可重构。研究表明一个大梳齿数量的平坦光频梳被作为光源可提高抽头数量，从而实现高分辨率的滤波器的重构。除此之外，通过预先引入色散，响应中的杂散也被有效地抑制。经仿真验证，该滤波器具有93 MHz的高分辨率，杂散抑制40 dB以上，创新性地构造了具有不同中心频率的低通、带通、高通、带阻滤波器，以及矩形、高斯形、sinc形等任意滤波形状，对于后续微波光子滤波器的研究起到了引导性作用。

Dealing with the increase in data workloads and network complexity requires efficient selective manipulation of any channels in hybrid mode-/wavelength-division multiplexing (MDM/WDM) systems. A reconfigurable optical add-drop multiplexer (ROADM) using special modal field redistribution is proposed and demonstrated to enable the selective access of any mode-/wavelength-channels. With the assistance of the subwavelength grating structures, the launched modes are redistributed to be the supermodes localized at different regions of the multimode bus waveguide. Microring resonators are placed at the corresponding side of the bus waveguide to have specific evanescent coupling of the redistributed supermodes, so that any mode-/wavelength-channel can be added/dropped by thermally tuning the resonant wavelength. As an example, a ROADM for the case with three mode-channels is designed with low excess losses of <0.6, 0.7, and 1.3 dB as well as low cross talks of < - 26.3, -28.5, and -39.3 dB for the TE₀, TE₁, and TE₂ modes, respectively, around the central wavelength of 1550 nm. The data transmission of 30 Gbps / channel is also demonstrated successfully. The present ROADM provides a promising route for data switching/routing in hybrid MDM/WDM systems.

基于电流调制和光注入共同作用下的带有饱和吸收体的垂直腔面发射激光器（VCSEL-SA），提出了一种可重构的光电逻辑门（NOT，NAND，NOR，XOR），数值研究了电流调制下VCSEL-SA的spiking动力学特性，及电流调制下光注入VCSEL-SA的逻辑运算性能。研究结果表明，对于电流调制下的光注入VCSEL-SA，光电逻辑门可以在一定的偏置电流范围内实现。通过选取合适的调制电流，可以实现重构的逻辑运算（NAND，NOR），且两个调制信号之间的时延对逻辑运算性能影响较小。通过改变电流调制信号的输入方式并移除光注入信号，VCSEL-SA可以实现XOR逻辑运算。此外，基于电流调制下光注入VCSEL-SA的可重构逻辑运算对噪声有较好的容忍性。研究结果可为未来光子神经网络解决复杂的信号处理任务提供一定的理论基础。

Photonic structures with topological edge states and resonance loops are both important in optical communication systems, but they are usually two separate structures. In order to obtain a photonic system combining properties from both, we design multiple-layer nested photonic topological structures. The nested topological loops not only have topological protection immune to structural disorder and defects, but also possess both the properties of unidirectional propagation and loop resonance. Through mode analysis and simulations, we find that the transport can form diverse circulation loops. Each loop has its own resonance frequencies and can be solely excited in the nested layered structure through choosing its resonance frequencies. As a result, this work shows great application prospects in the area of reconfigurable photonic circuits.