阿秒级时间抖动的飞秒光纤激光振荡器

项目名称： 阿秒级时间抖动的飞秒光纤激光振荡器

项目编号： No.61205131

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 信息四处

项目作者： 宋有建

作者单位： 天津大学

项目金额： 29万元

中文摘要： 自由运转状态下的飞秒激光振荡器输出的超短脉冲序列具有极佳的短期稳定性，其时间抖动的理论极限达到阿秒量级。这种具有阿秒时间精度的光学振荡器有望突破现代高精度与高速信息处理领域的发展瓶颈，并且为高速-高分辨率的模拟-数字信号转换，卫星编队飞行及阿秒泵浦-探测等前沿研究领域提供具有极限分辨本领的时钟信号。本项目旨在基于光纤飞秒激光技术研究具有量子极限时间抖动的高品质光学振荡器。利用具有阿秒时间分辨本领的平衡光学互相关方法，定量研究飞秒光纤激光振荡器内丰富的非线性过程耦合至时间抖动的关键物理机制，探索将飞秒光纤激光振荡器的高频时间抖动推向理论极限的技术途径。在此基础上，实现阿秒级时间抖动的高品质光纤激光振荡器，并演示低抖动时钟信号经过光纤链路的发布。

中文关键词： 阿秒；时间抖动；飞秒激光；光谱滤波；绝对距离测量

英文摘要： Ultrashort pulse train from free running femtosecond lasers shows superior short-term stability, with quantum-limited timing jitter approaching few attoseconds. Such attosecond precision optical oscillators have great potential to break the bottleneck of modern high precision and high speed signal processing fields, and supply precise clock signals for high speed and high resolution analog to digital conversion, satellite format flying and attosecond pump-probe experiment. This proposal researches on high quality optical oscillators with quantum limited timing jitter based on femtosecond fiber lasers. By using attosecond resolution balanced optical cross-correlation method, the inner mechanisms that the abundant nonlinear optical effects coupled to timing jitter will be studied, revealing the new physical mechanisms that contribute to timing jitter, and achieving the guidelines for reducing the high frequency timing jitter of fiber oscillators to theratical limit. Based on which, high quality femtosecond fiber laser oscillators with attosecond timing jitter will be realized. As an application of such attosecond timing jitter oscillators, the low jitter clocking signal distribution by fiber link will be demonstrated.

英文关键词： attosecond；timing jitter；femtosecond laser；spectral filtering；absolute distance measurement