Switching dynamics of dark-pulse Kerr frequency comb states in optical microresonators
Switching dynamics of dark-pulse Kerr frequency comb states in optical microresonators
复制标题
DOI：
10.1103/physreva.103.013513
复制
发表时间：
2021-01-14
影响因子：
2.9
通讯作者：
Torres-Company, Victor
中科院分区：
文献类型：
--
作者：
Nazemosadat, Elham;Fulop, Attila;Torres-Company, Victor
耗散克尔孤子是存在于非线性光学腔中的局域结构。它们导致了微梳——芯片级频率梳的形成，通过利用硅光子学的进步，可以促进精确的频率合成和计量。以往的论证主要集中在反常色散空腔上。尽管如此，在正常色散状态下，局部结构也以循环暗脉冲的形式存在，但其物理动力学尚不清楚。在这里，我们探索了在正常色散光学微谐振器中产生的暗脉冲克尔梳，并报告了在相干暗脉冲梳之间可逆切换的发现，从而可以确定地访问不同的状态。此外，我们揭示了暗脉冲克尔梳的形成与另一种共振的出现有关，这是一种从未在暗脉冲中观察到的特征，并归因于孤子行为。这些结果有助于理解正常色散非线性腔中的非线性物理特性，并为高转换效率微梳的产生提供了新的思路。
Dissipative Kerr solitons are localized structures that exist in nonlinear optical cavities. They lead to the formation of microcombs-chip-scale frequency combs that could facilitate precision frequency synthesis and metrology by capitalizing on advances in silicon photonics. Previous demonstrations have mainly focused on anomalous dispersion cavities. Notwithstanding, localized structures also exist in the normal dispersion regime in the form of circulating dark pulses, but their physical dynamics is far from being understood. Here, we explore dark-pulse Kerr combs generated in normal dispersion optical microresonators and report the discovery of reversible switching between coherent dark-pulse combs, whereby distinct states can be accessed deterministically. Furthermore, we reveal that the formation of dark-pulse Kerr combs is associated with the appearance of another resonance, a feature that has never been observed for dark pulses and is ascribed to soliton behavior. These results contribute to understanding the nonlinear physics in normal dispersion nonlinear cavities and provide insight into the generation of microcombs with high conversion efficiency.