飞秒钛宝石激光脉冲的载波包络相移测量研究

飞秒激光脉冲的载波包络相移测量与控制是实现阿秒脉冲与光学原子钟的重要内容，在利用光子晶体光纤扩展飞秒钛宝石激光振荡器光谱的研究基础上，通过自参考技术测量并优化了该激光输出脉冲的载波包络相移所引起的拍频信号.实验上采用半导体抽运的倍频Nd:YVO4532nm激光器作为抽运源，对钛宝石激光器所产生的平均功率500mW、脉宽18fs的光脉冲进行拍频测量后观察到约23MHz的频移，对应于每周期053π的载波包络相移.飞秒激光脉冲载波包络相移测量的实现对于进一步利用电子反馈系统精确控制载波包络相移，从而得到高稳定的飞秒激光频率梳具有重要意义. 关键词： 载波包络相移 光子晶体光纤 飞秒 超连续

Measurements of carrier-envelope-offset in the femtosecond Ti:sapphire laser

It has been an increasing interest in the measurement and control of the carrier-envelope-phase offset (CEO) of femtosecond laser, which leads to an unprecedented progress in both fields of ultrafast laser techniques and frequency metrology. Based on the supercontinuum with a bandwidth of exceeding one octave, we measured and optimized the beat frequency signal by the self-reference technique. A frequency offset of 23 MHz was observed for the Ti:sapphire laser with a power of 500mW and pulse width of 18fs; it corresponds to the CEO of 053π. This work is a significant step toward coherent control of the femtosecond laser.