Lücking Fabian, Crozatier Vincent, Forget Nicolas, Assion Andreas, Krausz Ferenc
Opt Lett. 2014 Jul 1;39(13):3884-7. doi: 10.1364/OL.39.003884.
The demand for ever shorter light pulses presents a challenge to the detection and stabilization of the carrier-envelope phase (CEP) in amplifier systems. Here we present a combination of single-shot detection and a fast actuator that is capable of measuring and correcting the CEP in every single shot emitted by a millijoule-scale, multi-kHz femtosecond laser amplifier. The residual CEP noise within 50 s amounts to 98 mrad rms in-loop (fast detection, 5·10⁵ shots) and 140 mrad out-of-loop (slow detection, 6250 shots), approaching the noise floor of the f-to-2f measurement. Both values represent a twofold improvement of the CEP stability over previously published results in comparable systems.
对更短光脉冲的需求给放大器系统中载波包络相位（CEP）的检测与稳定带来了挑战。在此，我们展示了一种单次检测与快速致动器相结合的方法，该方法能够测量并校正毫焦耳级、多千赫兹飞秒激光放大器发射的每一个单次脉冲中的CEP。50秒内的残余CEP噪声在环路内（快速检测，5·10⁵次脉冲）为均方根98毫弧度，在环路外（慢速检测，6250次脉冲）为140毫弧度，接近f至2f测量的本底噪声。这两个值均表明，与之前在可比系统中发表的结果相比，CEP稳定性提高了两倍。
