Comb-calibrated sub-Doppler spectroscopy with an external-cavity quantum cascade laser at 77 μm

Bidoor Alsaif; Davide Gatti; Marco Lamperti; Paolo Laporta; Aamir Farooq; Marco Marangoni

doi:10.1364/oe.27.023785

Comb-calibrated sub-Doppler spectroscopy with an external-cavity quantum cascade laser at 77 μm

Bidoor Alsaif, Davide Gatti, Marco Lamperti, Paolo Laporta, Aamir Farooq, Marco Marangoni

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6 Scopus citations

Abstract

We study the frequency noise and the referencing to a near-infrared frequency comb of a widely tunable external-cavity quantum-cascade-laser that shows a relatively narrow free-running emission linewidth of 1.7 MHz. The frequency locking of the laser to the comb further narrows its linewidth to 690 kHz and enables sub-Doppler spectroscopy on an N2O transition of the ν1 band near 7.7 μm with sub-MHz resolution and absolute frequency calibration. The combined uncertainty on the measured transition center is estimated to be less than 50 kHz

Original language	English (US)
Pages (from-to)	23785
Journal	Optics Express
Volume	27
Issue number	17
DOIs	https://doi.org/10.1364/oe.27.023785
State	Published - Aug 5 2019

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): OSR-2018-CARF-1975-06
Acknowledgements: King Abdullah University of Science and Technology (OSR-2018-CARF-1975-06), Fondazione Cariplo and Regione Lombardia (2016-1428).

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10.1364/oe.27.023785

https://repository.kaust.edu.sa/bitstream/10754/656525/1/oe-27-17-23785.pdf

Cite this

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title = "Comb-calibrated sub-Doppler spectroscopy with an external-cavity quantum cascade laser at 77 μm",

abstract = "We study the frequency noise and the referencing to a near-infrared frequency comb of a widely tunable external-cavity quantum-cascade-laser that shows a relatively narrow free-running emission linewidth of 1.7 MHz. The frequency locking of the laser to the comb further narrows its linewidth to 690 kHz and enables sub-Doppler spectroscopy on an N2O transition of the ν1 band near 7.7 μm with sub-MHz resolution and absolute frequency calibration. The combined uncertainty on the measured transition center is estimated to be less than 50 kHz",

author = "Bidoor Alsaif and Davide Gatti and Marco Lamperti and Paolo Laporta and Aamir Farooq and Marco Marangoni",

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AU - Alsaif, Bidoor

AU - Gatti, Davide

AU - Lamperti, Marco

AU - Laporta, Paolo

AU - Farooq, Aamir

AU - Marangoni, Marco

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Y1 - 2019/8/5

N2 - We study the frequency noise and the referencing to a near-infrared frequency comb of a widely tunable external-cavity quantum-cascade-laser that shows a relatively narrow free-running emission linewidth of 1.7 MHz. The frequency locking of the laser to the comb further narrows its linewidth to 690 kHz and enables sub-Doppler spectroscopy on an N2O transition of the ν1 band near 7.7 μm with sub-MHz resolution and absolute frequency calibration. The combined uncertainty on the measured transition center is estimated to be less than 50 kHz

AB - We study the frequency noise and the referencing to a near-infrared frequency comb of a widely tunable external-cavity quantum-cascade-laser that shows a relatively narrow free-running emission linewidth of 1.7 MHz. The frequency locking of the laser to the comb further narrows its linewidth to 690 kHz and enables sub-Doppler spectroscopy on an N2O transition of the ν1 band near 7.7 μm with sub-MHz resolution and absolute frequency calibration. The combined uncertainty on the measured transition center is estimated to be less than 50 kHz

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Comb-calibrated sub-Doppler spectroscopy with an external-cavity quantum cascade laser at 77 μm

Abstract

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