利用锁相环和TV-Rb钟控制飞秒激光脉冲的载波包络相移  

Control of carrier-envelope phase offset in femtosecond laser with PLL and TV-Rb clock

作　　者：韩海年[1] 张炜[1] 佟娟娟[2] 王延辉[2] 王鹏[1] 魏志义[1] 李德华[1] 沈乃澂[1] 聂玉昕[1] 董太乾[2] 

机构地区：[1]中国科学院物理研究所计量测试高技术联合实验室,北京100080 [2]北京大学信息科学技术学院,北京100871

出　　处：《物理学报》2007年第1期291-295,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:60225005;10227401;60490280);中国科学院知识创新工程资助的课题~~

摘　　要：为了实现对锁模飞秒钛宝石激光器的相位控制,采用改进的相移测量装置,使载波包络频移信号的信噪比提高到了40dB以上.在此优化测量结果的基础上,利用电子锁相环技术,通过PZT改变激光器腔内端镜的倾斜将飞秒激光脉冲的载波包络相位锁定到了微波参考源TV-Rb钟10MHz标准信号上,同时激光脉冲重复频率也采用另一个PZT控制激光腔长锁定到了同一个TV-Rb钟10MHz信号上.锁定后的结果显示重复频率的锁定达到了TV-Rb钟本身的稳定度,而载波包络相位锁定后比锁定前稳定度提高了三个数量级.With the fast development of the cycle-pulse lasers, the control of the carrier-envelope phase offset （CEO） frequency has been an important research subject in such fields as femtosecond optical frequency metrology, strong field physics and high harmonic generation. In this paper, a different measurement method for CEO is demonstrated and subsequently a better beat frequency signal with the signal-to-noise ratio greater than 40 dB is obtained. Based on this optimized beat frequency signal, the CEO of the Ti： sapphire laser is stabilized to the standard signal of 10 MHz of the microwave reference source TV-Rb clock by using the electronic phase-locked loop techniques and the piezo-transducers which are mounted on the mirror inside the laser cavity to change the frequency and phase. The repetition rate of the Ti： sapphire laser is locked to the same TV-Rb clock simultaneously. The experimental results showed that the stability of the repetition rate reached the same level as the TV-Rb clock and that of the CEO frequency was increased by three orders.

关 键 词：载波包络相移 锁相环 飞秒激光 TV-Rb钟 

分 类 号：TN249[电子电信—物理电子学]