标题： 可编程的空频线性变换在光子交织架构中的应用 显示英文标题

标题： Programmable Space-Frequency Linear Transformations in Photonic Interlacing Architectures

摘要： 可编程光子电路是多功能的平台，通过使用可重新配置的光电子元件在多个干涉路径中路由光，以执行复杂的离散线性操作。 这些电路在各种应用中具有高速和低功耗光子信息处理的潜力。 主流的可编程光子研究集中在对在一组空间分离的单模波导的模式幅度中编码的离散信号实施线性操作。 然而，许多光子器件应用需要在空频域中同时进行变换，其中信息既编码在波导的空间模式中，也编码在其光谱内容中。 在此，我们实验上展示了使用具有交替结构的$4 \times 4$端口可编程硅光子电路进行线性空频变换。 这种设计利用了耦合波导阵列的有限色散，以实现具有可重新配置的频率依赖矩阵元素的线性操作。 我们利用该器件进行波长解复用和滤波。 这种架构平台可以为各种应用的多功能器件铺平道路，从波长路由到可编程色散控制。 显示英文摘要

摘要： Programmable photonic circuits are versatile platforms that route light through multiple interference paths using reconfigurable optoelectronic elements to perform complex discrete linear operations. These circuits offer the potential for high-speed and low-power photonic information processing in various applications. The mainstream research on programmable photonics has focused on implementing linear operations on discrete signals encoded in the modal amplitudes of an array of spatially separated single-mode waveguides. However, many photonic device applications require simultaneous transformations in the space-frequency domain, where information is encoded in both the spatial modes of waveguides and their spectral content. Here, we experimentally demonstrate linear space-frequency transformations using a $4 \times 4$-port programmable silicon photonic circuit with an alternating architecture. This design leverages the limited dispersion of coupled waveguide arrays to enable linear operations with reconfigurable frequency-dependent matrix elements. We utilize this device to perform wavelength demultiplexing and filtering. This architecture platform can pave the way for versatile devices with applications ranging from wavelength routing to programmable dispersion control.