Monolithic, Ultralow Jitter, High Frequency Microwave Synthesizer

稳定的飞秒源的发展应用于超低定时抖动脉冲串产生和超低相位噪声微波产生将构成高速，高分辨率的数据处理，微波产生和计量学的重大进步。稳定锁模激光器可以提供具有超低时间抖动的光脉冲流，也可以用于产生超低相位噪声的微波信号。因此，期望开发基于锁模激光器的微波源，其具有相对于电子器件的显著改进的性能。该项目的目标是“单片、超低抖动、高频微波合成器”，旨在探索全偏振双折射光纤结构中紧凑型飞秒激光器的定时抖动的基本限制，并开发一种具有超低定时抖动和长期稳定性的光时钟和微波产生新技术。该计划由DESY的Franz Kaertner教授和中国北京大学的Zhigang Zhang教授合作完成。该研究建立在我们最近在全偏振双折射光纤激光器、阿秒定时抖动检测和控制以及低噪声微波提取方面的成就之上。该研究将对飞秒激光器的基本理解做出重要贡献，并开发实现飞秒稳定性微波产生的新方法。这些研究将理论和实验相结合，代表了开发下一代集成光学和电子学的高速信号处理技术的关键一步。

The development of stabilized femtosecond sources for applications in ultralow timing-jitter pulse train generation and ultralow phase-noise microwave generation would constitute a major advance in high-speed, high-resolution data processing, microwave generation, and metrology. Stabilized mode-locked lasers can provide optical pulse streams with ultralow timing-jitter and can also be used to generate ultralow phase noise microwave signals. Hence, it is desirable to develop microwave sources based on modelocked lasers that have dramatically improved performance over electronics. The objective of this proposal, "Monolithic, Ultralow Jitter, High Frequency Microwave Synthesizer," is to explore the fundamental limits for timing jitter in compact femtosecond lasers in all-polarization-maintaining-fiber architecture and develop a new technology for optical clock and microwave generation featuring ultralow timing jitter and long-term stability. This proposed program is a collaboration between Prof. Franz Kaertner at DESY and Prof. Zhigang Zhang from Peking University, China. The proposed research builds upon our recent achievements in all-polarization-maintaining-fiber lasers, attosecond timing jitter detection and control, and low-noise microwave extraction. The proposed research will make important contributions to the fundamental understanding of femtosecond lasers and develop new methods to achieve ultrahigh stability microwave generation. These studies integrate theory and experiment and represent a critical step toward developing the next generation of ultrahigh speed signal processing techniques that integrates optics and electronics.