如何设计集成可重构光滤波器实现Nyquist信号的产生和接收是实现高频谱利用率光信号传输领域关键问题。随着5G的发展，这个问题显得尤为迫切。申请人提出了三种硅基可重构光滤波器结构，滤波器具有平顶通带，滚降因子8%；可调自由光谱、中心波长、通带带宽、通阻比值；同时可产生/滤出多路信道的特性。本项目拟围绕“硅基可重构多信道Nyquist滤波器及应用”的主题，具体开展：(1)研制超大自由光谱、低插入损耗、高热调效率Nyquist滤波器；(2)研制可重构Nyquist滤波器；(3)研制高性能多信道Nyquist滤波器；(4)低损耗硅基纳米制备工艺和高效率新型电极的研究；(5) Nyquist滤波器芯片的制作，测试和实验验证。着重解决Nyquist滤波器可重构性，实现一片多用的功能。研制出低插损、高效率、可重构、多信道硅基Nyquist滤波器，为实现片上全光超通道收发机机提供有效途径。

It is very essential to achieve an integrated reconfigurable Nyquist filter to generate and receive signals for high spectrum efficiency optical communication systems, which is becoming more and more urgent because of the increasing development of 5G technology. The applicant proposes three silicon-based reconfigurable Nyquist filter structures with flat-top passband, roll-off factor of 8%, tunable free spectral range, operation wavelength, passband bandwidth, passband and stopband bandwidth ratio, and generate/receive multiple channels simultaneously. Therefore, this project is going to focus on the silicon-based high performance reconfigurable multi-channel Nyquist filters and their applications. The following five subjects will be included. (1) The design of ultra-large free spectral range, low insertion loss, high heater efficiency Nyquist filter; (2) The design of reconfigurable Nyquist filter; (3) The design of high-performance multi-channel Nyquist filter; (4) Fundamental investigation low loss silicon waveguide and novel high efficiency heater. (5) The fabrication, characterization and experimental verification of reconfigurable multi-channel Nyquist filters. The goal of this project is to find solutions for reconfigurability of Nyquist filters, enabling a variety of processing functions on signal processing using a single device. In this project, low-loss, high-efficiency reconfigurable multi-channel Nyquist filters to be designed and fabricated using silicon platform, providing effective methods for all-optical integrated supperchannel transceiver.