18 GHz Ultraviolet Astrocomb via Chip-Integrated Harmonic Generation
18 GHz Ultraviolet Astrocomb via Chip-Integrated Harmonic Generation
复制标题
通过芯片集成谐波产生的 18 GHz 紫外线 Astrocomb
DOI：
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Tobias Herr
中科院分区：
文献类型：
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作者：
M. Ludwig;Furkan Ayhan;T. Voumard;T. Wildi;Mahmoud A. A. Gaafar;Davide Grassani;E. Obrzud;Tobias M. Schmidt;F. Bouchy;L. G. Villanueva;V. Brasch;Tobias Herr
天文光谱仪以极高的精度进行校准，使得能够搜索类似地球的系外行星，并通过径向速度测量来量化宇宙的膨胀。激光频率梳(天文梳)[1]、[2]为这项任务提供了足够的校准标记。然而，10 GHz量级的天文光谱仪的典型分辨率需要这些梳子在同等高的重复频率下运行。由于可用于非线性频率转换的低脉冲能量，在这种情况下产生宽带梳子变得非常具有挑战性[3]。在这里，我们演示了重复频率为18 GHz的频率梳，这些频率梳通过在周期性极化的集成LiNbate波导中基于谐波产生[4]、[5]从电信波长频段转移到可见光和UV波长。
Calibration of astronomical spectrographs with extreme precision enables the search for Earth-like exoplanets and quantifying the expansion of the universe via radial velocity measurements. Laser frequency combs (astro-combs) [1], [2] provide adequate calibration markers for this task. However, the typical resolution of astronomical spectrographs on the order of 10 GHz requires these combs to operate at equivalently high repetition rates. Gen-erating broadband combs in this regime becomes extremely challenging due to the low pulse energies that are available for nonlinear frequency conversion [3]. Here, we demonstrate frequency combs at a repetition rate of 18 GHz that are transferred via $chi^{2}$-based harmonic generation in periodically-poled, integrated lithium niobate waveguides [4], [5] from the telecommunication wavelength band to visible and UV wavelengths.
准相位匹配波导中级联高次谐波产生的宽带紫外-可见光频率梳
DOI：
10.1364/josab.427086
发表时间：
2021
期刊：
Journal of the Optical Society of America B
影响因子：
--
作者：
Rutledge, Jay;Catanese, Anthony;Hickstein, Daniel D.;Diddams, Scott A.;Allison, Thomas K.;Kowligy, Abijith S.
通讯作者：
Kowligy, Abijith S.
影响因子：
3.8
作者：
McCracken, Richard A.;Charsley, Jake M.;Reid, Derryck T.
通讯作者：
Reid, Derryck T.