论文标题
$χ^{（2）} $微孔子中的中红外频率梳子和交错的光谱图案
Mid-infrared frequency combs and staggered spectral patterns in $χ^{(2)}$ microresonators
论文作者
论文摘要
频率光谱的潜力引起了人们对在集成光子设置中产生中红外频率梳的极大兴趣。然而，尽管微孔子和量子级联激光器的进展显着，但合适的MID-IR梳子来源的可用性仍然很少。在这里，我们提出了一种新方法，用于通过级联的三波混合来产生中红外小核心。通过将CDSIP $ _2 $微孔子泵送为1.55 $ $ m $ m m波长，具有低功率连续波激光器，我们生成$χ^{（2）} $频率combs in 3.1 $ $ m $ m波长，跨度约为30 nm。我们观察到普通的梳子状态，并具有谐振器的自由光谱范围的线间距，以及梳子周围的边带数和半谐波交替的侧带数，形成了光谱线路的交错图案。我们针对MID-IR MicroComb生成的方案与集成的电信激光器兼容。因此，它有可能用作简单且完全集成的MID-IR梳子来源，仅依靠一种单个材料。
The potential of frequency comb spectroscopy has aroused great interest in generating mid-infrared frequency combs in the integrated photonic setting. However, despite remarkable progress in microresonators and quantum cascade lasers, the availability of suitable mid-IR comb sources remains scarce. Here, we present a new approach for the generation of mid-IR microcombs through cascaded three-wave-mixing. By pumping a CdSiP$_2$ microresonator at 1.55 $μ$m wavelength with a low power continuous wave laser, we generate $χ^{(2)}$ frequency combs at 3.1 $μ$m wavelength, with a span of about 30 nm. We observe ordinary combs states with a line spacing of the free spectral range of the resonator, and combs where the sideband numbers around the pump and half-harmonic alternate, forming staggered patterns of spectral lines. Our scheme for mid-IR microcomb generation is compatible with integrated telecom lasers. Therefore, it has the potential to be used as a simple and fully integrated mid-IR comb source, relying on only one single material.
