Phase noise of electro-optic dual frequency combs
Phase noise of electro-optic dual frequency combs
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DOI：
10.1364/ol.418543
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发表时间：
2021-03-15
期刊：
影响因子：
3.6
通讯作者：
Liu, Zhixin
中科院分区：
文献类型：
--
作者：
Deakin, Callum;Zhou, Zichuan;Liu, Zhixin
双频梳是光谱学和信号处理的新工具。音调对的相对相位噪声确定性能（例如，信噪比）。虽然先前的研究已经表明，信号质量通常随着音调对之间的频率差的增加而降低，但是双频梳状系统的相对相位噪声的缩放尚未被完全表征。本文对相干电光双频梳状系统的相位噪声进行了建模和分析。我们的研究结果表明，在高偏移频率，相位噪声是一个不相干的总和的定时相位噪声的两个梳，乘以线数。然而，在低失调频率下，由于公共参考频率的相干性，相位噪声缩放得更慢。(C)2021美国光学学会
Dual frequency combs are emerging as new tools for spectroscopy and signal processing. The relative phase noise of the tone pairs determines the performance (e.g., signal-tonoise ratio) of the detected spectral components. Although previous research has shown that the signal quality generally degrades with an increase in frequency difference between tone pairs, the scaling of the relative phase noise of dual frequency comb systems has not been fully characterized. In this Letter, we model and characterize the phase noise of a coherent electro-optic dual frequency comb system. Our results show that at high offset frequencies, the phase noise is an incoherent sum of the timing phase noise of the two combs, multiplied by line number. At lowoffset frequencies, however, the phase noise scales more slowly due to the coherence of the common frequency reference. (C) 2021 Optical Society of America