Institute of Applied Physics, Abbe Center of Photonics, Jena 07745, Germany. steffen.haedrich@uni‑jena.de
Opt Lett. 2012 Dec 1;37(23):4910-2. doi: 10.1364/OL.37.004910.
It is shown that timing jitter in optical parametric chirped-pulse amplification induces spectral drifts that transfer to carrier-envelope phase (CEP) instabilities via dispersion. Reduction of this effect requires temporal synchronization, which is realized with feedback obtained from the angularly dispersed idler. Furthermore, a novel method to measure the CEP drifts by utilizing parasitic second harmonic generation within parametric amplifiers is presented. Stabilization of the timing allows the obtainment of a CEP stability of 86 mrad over 40 min at 150 kHz repetition rate.
研究表明，光参量啁啾脉冲放大中的定时抖动会导致光谱漂移，通过色散将其转换为载波包络相位（CEP）不稳定性。减少这种影响需要时间同步，这可以通过从角度分散的闲频光获得的反馈来实现。此外，还提出了一种利用参量放大器中的寄生二次谐波产生来测量 CEP 漂移的新方法。定时稳定化允许在 150 kHz 重复率下获得 40 分钟内 86 mrad 的 CEP 稳定性。
