Monolithic, Ultralow Jitter, High Frequency Microwave Synthesizer

稳定飞秒源在超低时间抖动脉冲序列产生和超低相位噪声微波产生中的应用，将构成高速、高分辨率数据处理、微波产生和计量学方面的重大进步。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，开发基于模型锁定激光器的微波源是可取的，这种激光器的性能大大提高了电子器件的性能。本提案“单片，超低抖动，高频微波合成器”的目的是探索全保偏光纤结构中紧凑型飞秒激光器定时抖动的基本限制，并开发具有超低定时抖动和长期稳定性的光时钟和微波生成新技术。本项目由DESY的Franz Kaertner教授和北京大学的张志刚教授合作完成。本研究基于我们在全保偏光纤激光器、阿秒定时抖动检测与控制、低噪声微波提取等方面的最新成果。本研究将对飞秒激光的基本认识和实现超高稳定微波产生的新方法做出重要贡献。这些研究将理论和实验相结合，代表了开发下一代超高速信号处理技术的关键一步，该技术集成了光学和电子技术。

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.