Real-Time Characterization of Period-Doubling Dynamics in Uniform and Dispersion Oscillating Fiber Ring Cavities
Real-Time Characterization of Period-Doubling Dynamics in Uniform and Dispersion Oscillating Fiber Ring Cavities
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DOI：
10.1103/physrevx.9.041030
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发表时间：
2019-11-11
影响因子：
12.5
通讯作者：
Trillo, Stefano
中科院分区：
文献类型：
--
作者：
Bessin, Florent;Copie, Francois;Trillo, Stefano
无源光学谐振器中的调制不稳定性，频率梳和脉冲串产生的触发机制，显示出涉及周期一（P1）与周期二（P2）动态演化的政权之间的转变。后者是系统中发生的参数共振的特征，它可以由腔的固有周期性或腔参数的空间调制引起。我们描述了这两种情况下的P1-P2跃迁，采用光纤谐振器，其中腔内光纤可以均匀或色散调制。我们设置的关键元素是一个时间透镜，我们利用它来解决连续往返的时间动态，为适当改变腔参数提供P1-P2跃迁存在的清晰证据，以及对相对时间模式的成功表征。我们的发现揭示了新的机制，即被称为Lugiato-Lefever方程的平均模型被证明不足以解释动力学，而结果是在完整的Ikeda图的基础上正确预测和描述的。
Modulational instability in passive optical resonators, the triggering mechanism of frequency comb and pulse train generation, is shown to exhibit transitions between regimes involving period-one (P1) versus period-two (P2) dynamical evolutions. The latter is a signature of parametric resonance occurring in the system, which can arise either from intrinsic cavity periodicity or from spatial modulation of the cavity parameters. We characterize the P1-P2 transition for both cases, employing a fiber resonator where the intracavity fiber can be either uniform or dispersion modulated. The key element of our setup is a time lens which we exploit to resolve the temporal dynamics over successive round trips, allowing crystal-clear evidence of the existence of P1-P2 transitions for suitable changes of cavity parameters, as well as for the successful characterization of the relative temporal patterns. Our findings reveal new regimes where the averaged model known as the Lugiato-Lefever equation turns out to be inadequate to explain the dynamics, whereas the results are correctly predicted and described on the basis of the full Ikeda map.