Full-field longitudinal characterization of picosecond pulse train formation in optical fibers is reported. The spatio-temporal evolution is obtained via fast and non-invasive distributed measurements in phase and intensity of the main spectral components of the pulses. To illustrate the performance of the setup, we report, to the best of our knowledge, the first time-domain experimental observation of the symmetry breaking of Fermi–Pasta–Ulam recurrences. The experimental results are in good agreement with numerical simulations.

中文翻译：

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光纤整个长度上呼吸动力学的全场表征

据报道，皮秒脉冲序列在光纤中形成的全场纵向表征。时空演变是通过对脉冲主要频谱分量的相位和强度进行快速且无创的分布式测量获得的。为了说明该装置的性能，据我们所知，我们首次报告了费米－帕斯塔－乌拉姆重复发生的对称性破坏的时域实验观察。实验结果与数值模拟吻合良好。