论文标题
高Q窃窃私语模式微孔子在近粉状光谱范围内
High-Q Whispering-Gallery-Modes Microresonators in the Near-Ultraviolet Spectral Range
论文作者
论文摘要
高$ Q $窃窃廊模式微孔子是基石，可以开发紧凑的相干来源，例如单个频率激光或频率梳子。这项工作报告了近乎紫外线中低语画廊模式微球的详细表征。得益于稳健的角度抛光纤维，可以研究不同的耦合机制，从而获得了谐振器中的光耦合。 $ 2.2 \ times 10^8 $的固有$ Q_0 $ -FACTOR和$ 7.3 \ times 10^4 $的技巧以420 nm的波长报告。讨论了有助于$ Q_0 $因素的物理机制，并绘制了改善性能的路线。这样的高$ Q $因子和高技巧是简化基于WGM微孔子的光子设备的关键要素。
High-$Q$ whispering gallery mode microresonators are cornerstones to develop compact coherent sources like single frequency lasers or frequency combs. This work reports a detailed characterization of a whispering gallery mode microsphere in the near ultraviolet. Light coupling in the resonator is obtain thanks to a robust angle-polished fiber allowing to investigate the different coupling regimes. An intrinsic $Q_0$-factor of $2.2 \times 10^8$ and a finesse of $7.3 \times 10^4$ are reported at a wavelength of 420 nm. Physical mechanisms contributing to the $Q_0$-factor are discussed and routes to improve the performances are drawn. Such high-$Q$ factor and high finesse are key ingredients to ease the study of photonic devices based on WGM microresonators.
