Phase-locked feed forward stabilization for dual comb spectroscopy

Bibliographic Details
Title:	Phase-locked feed forward stabilization for dual comb spectroscopy
Authors:	Pal, Mithun, Eber, Alexander, Fürst, Lukas, Hruska, Emily, Ossiander, Marcus, Bernhardt, Birgitta
Publication Year:	2024
Collection:	Physics (Other)
Subject Terms:	Physics - Optics, Physics - Applied Physics
More Details:	Sustained mutual coherence between two combs over extended periods is a prerequisite for dual-comb spectroscopy (DCS), particularly in achieving high-resolution molecular spectroscopy and precise spectral measurements. However, achieving long coherence times remains a challenge for Yb-doped frequency combs. This work introduces an experimental approach for phase-stable DCS using Yb-doped frequency combs at 1.03 ${\mu}$m with a novel feed-forward method, combatting the limitations of mutual coherence. Without relying on computer-based phase correction, we achieve a coherence time of 1000 seconds - three orders of magnitude longer than the current state of the art for DCS. This extended coherence enables time-domain averaging, resulting in a signal-to-noise ratio (SNR) of 2045. We demonstrate high-resolution monitoring of weak overtone transitions in the P and R branches of C${_2}$H${_2}$, with good agreement with HITRAN. The phase-locked multiheterodyne system also enables phase spectrum measurements with a scatter down to 7 mrad. Furthermore, we successfully extend our technique to the visible wavelength range using second harmonic generation, achieving high-resolution spectra of NO${_2}$ with excellent SNR. The method offers high-frequency accuracy and demonstrates the potential of Yb-doped systems for multiplexed metrology, effectively extending the capabilities of DCS as a powerful tool for multi-disciplinary applications.
Document Type:	Working Paper
Access URL:	http://arxiv.org/abs/2412.05972
Accession Number:	edsarx.2412.05972
Database:	arXiv

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Items	– Name: Title Label: Title Group: Ti Data: Phase-locked feed forward stabilization for dual comb spectroscopy – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Pal%2C+Mithun%22">Pal, Mithun</searchLink><br /><searchLink fieldCode="AR" term="%22Eber%2C+Alexander%22">Eber, Alexander</searchLink><br /><searchLink fieldCode="AR" term="%22Fürst%2C+Lukas%22">Fürst, Lukas</searchLink><br /><searchLink fieldCode="AR" term="%22Hruska%2C+Emily%22">Hruska, Emily</searchLink><br /><searchLink fieldCode="AR" term="%22Ossiander%2C+Marcus%22">Ossiander, Marcus</searchLink><br /><searchLink fieldCode="AR" term="%22Bernhardt%2C+Birgitta%22">Bernhardt, Birgitta</searchLink> – Name: DatePubCY Label: Publication Year Group: Date Data: 2024 – Name: Subset Label: Collection Group: HoldingsInfo Data: Physics (Other) – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Physics+-+Optics%22">Physics - Optics</searchLink><br /><searchLink fieldCode="DE" term="%22Physics+-+Applied+Physics%22">Physics - Applied Physics</searchLink> – Name: Abstract Label: Description Group: Ab Data: Sustained mutual coherence between two combs over extended periods is a prerequisite for dual-comb spectroscopy (DCS), particularly in achieving high-resolution molecular spectroscopy and precise spectral measurements. However, achieving long coherence times remains a challenge for Yb-doped frequency combs. This work introduces an experimental approach for phase-stable DCS using Yb-doped frequency combs at 1.03 ${\mu}$m with a novel feed-forward method, combatting the limitations of mutual coherence. Without relying on computer-based phase correction, we achieve a coherence time of 1000 seconds - three orders of magnitude longer than the current state of the art for DCS. This extended coherence enables time-domain averaging, resulting in a signal-to-noise ratio (SNR) of 2045. We demonstrate high-resolution monitoring of weak overtone transitions in the P and R branches of C${_2}$H${_2}$, with good agreement with HITRAN. The phase-locked multiheterodyne system also enables phase spectrum measurements with a scatter down to 7 mrad. Furthermore, we successfully extend our technique to the visible wavelength range using second harmonic generation, achieving high-resolution spectra of NO${_2}$ with excellent SNR. The method offers high-frequency accuracy and demonstrates the potential of Yb-doped systems for multiplexed metrology, effectively extending the capabilities of DCS as a powerful tool for multi-disciplinary applications. – Name: TypeDocument Label: Document Type Group: TypDoc Data: Working Paper – Name: URL Label: Access URL Group: URL Data: <link linkTarget="URL" linkTerm="http://arxiv.org/abs/2412.05972" linkWindow="_blank">http://arxiv.org/abs/2412.05972</link> – Name: AN Label: Accession Number Group: ID Data: edsarx.2412.05972
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RecordInfo	BibRecord: BibEntity: Subjects: – SubjectFull: Physics - Optics Type: general – SubjectFull: Physics - Applied Physics Type: general Titles: – TitleFull: Phase-locked feed forward stabilization for dual comb spectroscopy Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Pal, Mithun – PersonEntity: Name: NameFull: Eber, Alexander – PersonEntity: Name: NameFull: Fürst, Lukas – PersonEntity: Name: NameFull: Hruska, Emily – PersonEntity: Name: NameFull: Ossiander, Marcus – PersonEntity: Name: NameFull: Bernhardt, Birgitta IsPartOfRelationships: – BibEntity: Dates: – D: 08 M: 12 Type: published Y: 2024
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