全光纤直接位相调制啁啾脉冲激光源

项目名称： 全光纤直接位相调制啁啾脉冲激光源

项目编号： No.61205103

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： 汪小超

作者单位： 中国科学院上海光学精密机械研究所

项目金额： 22万元

中文摘要： 高能量超短激光脉冲在激光加工、超快光谱学、医学、高能物理等多种领域应用广泛。目前，超短脉冲产生过程中使用的啁啾脉冲种子源大多采用锁模脉冲经光栅展宽器展宽获得。针对目前技术方案中集成化，色散控制等方面存在的问题，创新性采用直接位相调制的方法由窄线宽脉冲获得啁啾脉冲。通过理论模拟多次位相调制叠加实现光谱展宽的过程，获得各参数对展宽特性的影响；在理论指导下，设计多次位相调制结构验证上述理论分析结果，实现啁啾脉冲输出。在此基础上，理论分析不同的位相调制驱动信号波形对位相分布的影响；验证通过设计位相调制的驱动信号波形对高阶色散或者非线性效应引入的光谱变化进行补偿的可行性，并使用任意波形发生器验证理论模拟结果。该技术方案可实现全光纤化，集成性和稳定性高，色散控制灵活，并有望通过高速电子学技术实现脉冲位相特性可编程控制，大幅度提高CPA系统的可控性和输出性能。

中文关键词： 啁啾脉冲放大；光谱控制；位相调制；时间同步；

英文摘要： Ultra-short optical pulses with high pulse energy are required for a variety of applications, such as laser micromachining, ultrafast frequency metrology, medicine and high-energy physics. The chirped pulse seeds commonly used in the producing progress of ultra-short pulses are stretched from the mode-locking pulses. However, this scheme is expensive, without flexible control of dispersion, and has large footprint. For these problems, innovative chirped pulse laser source by direct phase modulation is designed. By theoretical simulation of the phase modulation accumulation with successive passes, the impact of various parameters on the characteristics of the spectral broadening is analyzed and the multi-pass structure is designed to verify the above theoretical analysis. On this basis, theoretically analyze of programmatic control of phase modulation and verify the programmatic spectral control by design phase modulation drive signal waveform ,which can be used for the compensation of phase errors introduced by the high-order dispersion or nonlinear effect . The chirped pulse laser source by direct phase modulation can be realized in all-fiber form which is with high stability and compact. Programmatic control of phase profile should also be expected to be realized and the controllability and output performance

英文关键词： CPA；spectral shaping；phase modulation；time synchronization；