Reference-free dual-comb spectroscopy with inbuilt coherence

We demonstrate a simple system for dual-comb spectroscopy based on two inherently coherent optical frequency combs generated via seeded parametric down-conversion. The inbuilt coherence is established by making the two combs share a common comb line. We show that the inbuilt coherence makes it possi...

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Bibliographic Details
Main Authors Roiz, Mikhail, Larnimaa, Santeri, Uotila, Touko, Narhi, Mikko, Vainio, Markku
Format Journal Article
LanguageEnglish
Published 06.05.2024
Subjects
Physics - Optics
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Summary:We demonstrate a simple system for dual-comb spectroscopy based on two inherently coherent optical frequency combs generated via seeded parametric down-conversion. The inbuilt coherence is established by making the two combs share a common comb line. We show that the inbuilt coherence makes it possible to use a simple numerical post-processing procedure to compensate for small drifts of the dual-comb interferogram arrival-time and phase. This enables long-time coherent averaging of the interferograms.
DOI:10.48550/arxiv.2405.03182