论文标题
在$χ^{（2）} $光学微孔子中，行走受控的自启动频率梳子
Walk-off controlled self-starting frequency combs in $χ^{(2)}$ optical microresonators
论文作者
论文摘要
如今，对$χ^{（3）}中频率梳子的调查正在迅速发展。转换为$χ^{（2）} $谐振器有望进一步进步并带来新的挑战。在这里，梳子的产生不仅需要第一和第二谐波（FHS和SHS）和两个分散系数，而且还需要在组速度上存在实质性差异 - 空间散步。我们预测行走受控的高度稳定的梳子生成，与$χ^{（3）} $ case中已知的梳子截然不同。这包括抗碘状态的一般概念，相干抗碘的稳态（孤子）的形成，其中FH和SH信封在没有形状变化的情况下以常见的速度移动，对抗颗粒状稳态的表征以及梳子谱对泵谱和组速度差异的依赖。
Investigations of frequency combs in $χ^{(3)}$ optical microresonators are burgeoning nowadays. Changeover to $χ^{(2)}$ resonators promises further advances and brings new challenges. Here, the comb generation entails not only coupled first and second harmonics (FHs and SHs) and two dispersion coefficients, but also a substantial difference in the group velocities - the spatial walk-off. We predict walk-off controlled highly stable comb generation, drastically different from that known in the $χ^{(3)}$ case. This includes the general notion of antiperiodic state, formation of coherent antiperiodic steady states (solitons), where the FH and SH envelopes move with a common velocity without shape changes, characterization of the family of antiperiodic steady states, and the dependence of comb spectra on the pump power and the group velocity difference.
