基于宇称-时间对称的带宽可调光带通滤波器-原始数据

芯片级可调滤波器是满足波分复用系统、信道路由和交换等对可重构性的要求必不可少的器件。在此，我们提出了一种基于宇称时间对称耦合微谐振器系统的带宽可调带通滤波器方案。利用PT对称系统中的异常点(EP)概念，通过对耦合环之间的相对谐振频率进行调谐，实现了大带宽可调性。理论研究表明，带宽调谐范围取决于微谐振腔的固有损耗，以及两个腔之间的损耗对比。我们的概念验证设备证实了可调谐性，并显示带宽调谐范围从21 GHz到49 GHz，消光比大于15 dB。理论与实验的差异主要是由于耦合系数的未优化设计以及制造误差。我们基于PT对称的设计显示了实现可调谐带通滤波器的独特路线，为探索传统集成器件中的非厄米光操纵提供了新方法。利用光谱仪进行数据采集,采用matlab软件对采集数据做图获得论文中的相关实验结果图片。数据量2.64MB。

Chip-scale tunable filters are indispensable devices that meet the requirements for reconfigurability in applications such as wavelength division multiplexing (WDM) systems, channel routing and switching. Herein, we propose a bandwidth-tunable bandpass filter scheme based on a parity-time (PT) symmetric coupled microring resonator system. Leveraging the concept of exceptional points (EPs) in PT-symmetric systems, tuning the relative resonant frequency between the coupled microrings enables large-bandwidth tunability. Theoretical investigations reveal that the bandwidth tuning range depends on the intrinsic loss of the microresonators and the loss contrast between the two cavities. Our proof-of-concept device validates the tunability, demonstrating a bandwidth tuning range from 21 GHz to 49 GHz with an extinction ratio greater than 15 dB. The discrepancy between theoretical and experimental results is mainly attributed to the unoptimized coupling coefficient design and fabrication errors. Our PT-symmetric-based design presents a unique pathway toward realizing tunable bandpass filters, offering a new approach for exploring non-Hermitian optical manipulation in conventional integrated devices. Data was collected using a spectrometer, and the relevant experimental result figures in the paper were obtained by plotting the collected data with MATLAB. The total data volume is 2.64 MB.