Chirped-pulsed Kerr solitons in the Lugiato-Lefever equation with spectral filtering.
Chirped-pulsed Kerr solitons in the Lugiato-Lefever equation with spectral filtering.
复制标题
带频谱滤波的 Lugiato-Lefever 方程中的啁啾脉冲克尔孤子。
DOI：
10.1103/physrevresearch.3.033252
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发表时间：
2021
影响因子：
4.2
通讯作者：
Renninger,WilliamH
中科院分区：
文献类型：
--
作者：
Dong,Xue;Spiess,Christopher;Bucklew,VictorG;Renninger,WilliamH
光学克尔谐振器以简单紧凑的设计支持各种稳定的非线性现象。超短脉冲和频率梳的产生已被证明有利于几个应用，包括光谱学和电信。最常见的反常色散克尔谐振腔可以用一个研究得很好的平均场Lugiato-Lefever方程（LLE）精确描述。然而，最近观察到的具有光谱滤波器的正常色散谐振器中的高啁啾脉冲不能。在这里，我们研究的LLE在正常色散制度修改高斯光谱滤波器（LLE-F）。除了与LLE相关的解决方案，我们发现稳定的高啁啾脉冲。解决方案在很大程度上取决于滤波器带宽。由于每次往返的变化很大，LLE-F的有效性在很大范围的实验相关参数上失败。虽然平均场方法导致相对于非线性系数和色散的准确预测，但驱动功率对损耗的依赖性显著偏离实验精确模型，这导致克尔谐振器包括从低Q因子腔产生频率梳的机会。
Optical Kerr resonators support a variety of stable nonlinear phenomena in a simple and compact design. The generation of ultrashort pulses and frequency combs has been shown to benefit several applications, including spectroscopy and telecommunications. The most common anomalous dispersion Kerr resonators can be accurately described by a well-studied mean-field Lugiato-Lefever equation (LLE). Recently observed highly chirped pulses in normal dispersion resonators with a spectral filter, however, cannot. Here, we examine the LLE in the normal dispersion regime modified with a Gaussian spectral filter (LLE-F). In addition to solutions associated with the LLE, we find stable highly chirped pulses. Solutions are strongly dependent on the filter bandwidth. Because of the large changes per round trip, the validity of the LLE-F fails over a large range of experimentally relevant parameters. While the mean-field approach leads to accurate predictions with respect to the nonlinearity coefficient and the dispersion, the dependence of drive power on loss deviates significantly from an experimentally accurate model, which leads to opportunities for Kerr resonators including frequency comb generation from low-Q-factor cavities.