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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.
In order to realize the phase control of the mode-locked femtosecond Ti: sapphire laser, an improved phase shift measurement device was used to improve the signal-to-noise ratio of the carrier envelope frequency-shifted signal to over 40 dB.On the basis of optimizing the measurement results, Phase-loop technology, through the PZT to change the tilt of the laser cavity endoscope carrier femtosecond laser pulse carrier envelope phase locked to the microwave reference TV-Rb clock 10MHz standard signal, while the laser pulse repetition frequency also uses another PZT control laser The length of the cavity is locked to the same TV-Rb 10MHz signal.The result of the locking shows that the repetition rate locking achieves the stability of the TV-Rb clock itself and the stability of the carrier envelope phase lock is increased by three Magnitude.