基于双波长半导体激光器产生高性能宽带可调谐微波的研究

高质量、高频、可调谐微波源在通讯、测绘、雷达等领域正在发挥越来越重要的作用。电子学方法在高频段产生的微波在质量、可调谐性上尚不理想。本项目最终面向可集成式光生微波源研究，以产生高质量宽带可调谐微波为目标，提出一种以双波长半导体激光器（DWLD）为关键器件，以光电振荡环路（OEO）为实现结构的新型微波源。该方案以DWLD作为有源光子滤波器，既可以发挥OEO结构卓越的微波发生能力，又可以解决传统OEO方案中起振阈值高、调谐性差的问题。项目将重点研究宽带可调谐、输出稳定、具有较高相干性的DWLD设计理论和制备方法，DWLD在光注入情况下的动态行为、DWLD-OEO环路自启动特征和稳态工作行为以及DWLD-OEO在微波产生、时钟提取等方面的系统应用。该研究将为未来完全可集成的单片式宽带可调谐高频光生微波源的研制工作铺平道路，并为其它光子集成功能器件研制开发方面提供必要的技术积累和理论指导。

High-frequency high-performance tunable microwave source is playing an increasingly important role in the fields of communication system, metrology, radar system, etc. However, traditional microwave generation scheme based on electronics methods cannot meet the requirement for performance and tunability in high frequencies applications. In this study, we will propose a new microwave generation configuration based on dual-wavelength laser diode (DWLD) which serves as an active tunable photonic filter in an optoelectronic oscillation loop. This configuration can take advantage of the superior performance of optoelectronic oscillator (OEO), while on the one hand, avoid the problems of high oscillation threshold and poor tunablity in traditional OEO. The project will focus on the design and fabrication of broadband tunable DWLD with stable and coherent output, the dynamic behavior of DWLD under optial-injection,starting dynamics and working characteristic of DWLD-OEO, and system application of DWLD-OEO in the fields of microwave generation, clock extraction etc. The research will facilitate the development of fully integrated single-chip photonic microwave generator, and provide the necessary technical expertise and theoretical guidance for the future research on photonic integrated circuits.