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Phase noise of electro-optic dual frequency combs

Deakin, C; Zhou, Z; Liu, Z; (2021) Phase noise of electro-optic dual frequency combs. Optics Letters , 46 (6) pp. 1345-1348. 10.1364/ol.418543. Green open access

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Abstract

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-to-noise 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 low offset frequencies, however, the phase noise scales more slowly due to the coherence of the common frequency reference.

Type: Article
Title: Phase noise of electro-optic dual frequency combs
Open access status: An open access version is available from UCL Discovery
DOI: 10.1364/ol.418543
Publisher version: https://doi.org/10.1364/ol.418543
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10123705
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