Tsao Eugene, Xie Yijun, Nie Mingming, Huang Shu-Wei
Opt Lett. 2022 Jan 1;47(1):122-125. doi: 10.1364/OL.441165.
Kerr microcombs hold the promise of bringing frequency combs onto the chip and into a variety of applications requiring low size, weight, power, and cost. However, reliable Kerr microcomb generation is hindered by the thermal effect and multistability of dissipative Kerr solitons (DKSs). Past approaches toward Kerr microcomb reliability include either deterministic single-soliton generation or self-starting soliton behavior but not both. Here we describe a regime of DKSs that is both deterministic and self-starting, in which only a single soliton can stably exist. We term this new DKS regime "monostable DKSs" (MS-DKSs) as all other optical behaviors, such as continuous-wave-only and multiple solitons, are fundamentally forbidden by the design. We establish a graphical model to describe MS-DKSs and discuss the design principles of MS-DKSs. We numerically demonstrate the MS-DKS behavior in an example periodically poled lithium niobate microring resonator.
克尔微梳有望将频率梳集成到芯片上，并应用于各种对尺寸、重量、功耗和成本要求较低的领域。然而，热效应和耗散克尔孤子（DKS）的多稳定性阻碍了可靠的克尔微梳产生。过去提高克尔微梳可靠性的方法要么是确定性的单孤子产生，要么是自启动孤子行为，但不能两者兼具。在此，我们描述了一种兼具确定性和自启动特性的DKS状态，其中只有单个孤子能够稳定存在。我们将这种新的DKS状态称为“单稳态DKS”（MS-DKS），因为所有其他光学行为，如仅连续波和多个孤子，从设计上就被根本禁止了。我们建立了一个图形模型来描述MS-DKS，并讨论了MS-DKS的设计原理。我们通过数值模拟展示了周期性极化铌酸锂微环谐振器示例中的MS-DKS行为。
