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Characterization and calibration of a Fourier-transform spectrometer using a laser frequency comb

  • We have used a laser frequency comb with a repetition frequency of 𝜈rep≈1  GHz to measure the drift and dispersion of a Fourier-transform spectrometer (FTS). We used the electronic measurements of 𝜈rep and 𝜈CEO to create a reference line list. We measured 28 interferograms and computed the phase and power spectra. The analysis of the interferograms and phase spectra allowed for compensation of several spectroscopic artifacts. In the computed power spectra, we detected ∼64.000 suitable lines in the near-infrared bandwidth Δ𝜈=308.79–374.74  THz. The residual dispersion of the FTS can be described by two factors, a linear dispersion and a constant offset. Both are highly correlated and need to be computed simultaneously. The factors were computed from the comparison of a reference with measured line lists. The linear dispersion factor is found to be varying on the order of 10−8  Hz/Hz, while the constant offset is of the order of 107  Hz. Using two factors for calibration, the difference between the reference and the measured line list can be removed completely with an uncertainty of ∼65  kHz corresponding to a precision of 0.5·10−9  Hz/Hz.

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Metadaten
Author:Phillip Huke, M. Debus, M. Zechmeister, A. Reiners
DOI:https://doi.org/10.1364/JOSAB.36.001899
Parent Title (English):Journal of the Optical Society of America B
Document Type:Article
Language:English
Year of first Publication:2019
Release Date:2025/01/23
Tag:Fourier-transform spectromete; laser frequency comb
Volume:Vol. 36
Issue:7
First Page:1899
Last Page:1906
Institutes:Fachbereich Technik
Research Focus Areas:nachhaltige Technologien und Prozesse