Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser

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

Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser

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

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Abstract

We report the first experimental demonstration of frequency-locking of an extended-cavity quantum-cascade-laser (EC-QCL) to a near-infrared frequency comb. The locking scheme is applied to carry out absolute spectroscopy of N2O lines near 7.87 {\mu}m with an accuracy of ~60 kHz. Thanks to a single mode operation over more than 100 cm^{-1}, the comb-locked EC-QCL shows great potential for the accurate retrieval of line center frequencies in a spectral region that is currently outside the reach of broadly tunable cw sources, either based on difference frequency generation or optical parametric oscillation. The approach described here can be straightforwardly extended up to 12 {\mu}m, which is the current wavelength limit for commercial cw EC-QCLs.

Original language	English (US)
Journal	Applied Physics
State	Published - Jul 31 2017

Keywords

physics.ins-det
physics.optics

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@article{9d23815103524a56ae3f46c32b1902b9,

title = "Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser",

abstract = " We report the first experimental demonstration of frequency-locking of an extended-cavity quantum-cascade-laser (EC-QCL) to a near-infrared frequency comb. The locking scheme is applied to carry out absolute spectroscopy of N2O lines near 7.87 {\mu}m with an accuracy of ~60 kHz. Thanks to a single mode operation over more than 100 cm^{-1}, the comb-locked EC-QCL shows great potential for the accurate retrieval of line center frequencies in a spectral region that is currently outside the reach of broadly tunable cw sources, either based on difference frequency generation or optical parametric oscillation. The approach described here can be straightforwardly extended up to 12 {\mu}m, which is the current wavelength limit for commercial cw EC-QCLs. ",

keywords = "physics.ins-det, physics.optics",

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

note = "4 pages, 3 figures",

year = "2017",

month = jul,

day = "31",

language = "English (US)",

journal = "Applied Physics",

issn = "1996-0948",

publisher = "Springer Heidelberg",

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TY - JOUR

T1 - Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser

AU - Lamperti, Marco

AU - Alsaif, Bidoor

AU - Gatti, Davide

AU - Fermann, Martin

AU - Laporta, Paolo

AU - Farooq, Aamir

AU - Marangoni, Marco

N1 - 4 pages, 3 figures

PY - 2017/7/31

Y1 - 2017/7/31

N2 - We report the first experimental demonstration of frequency-locking of an extended-cavity quantum-cascade-laser (EC-QCL) to a near-infrared frequency comb. The locking scheme is applied to carry out absolute spectroscopy of N2O lines near 7.87 {\mu}m with an accuracy of ~60 kHz. Thanks to a single mode operation over more than 100 cm^{-1}, the comb-locked EC-QCL shows great potential for the accurate retrieval of line center frequencies in a spectral region that is currently outside the reach of broadly tunable cw sources, either based on difference frequency generation or optical parametric oscillation. The approach described here can be straightforwardly extended up to 12 {\mu}m, which is the current wavelength limit for commercial cw EC-QCLs.

AB - We report the first experimental demonstration of frequency-locking of an extended-cavity quantum-cascade-laser (EC-QCL) to a near-infrared frequency comb. The locking scheme is applied to carry out absolute spectroscopy of N2O lines near 7.87 {\mu}m with an accuracy of ~60 kHz. Thanks to a single mode operation over more than 100 cm^{-1}, the comb-locked EC-QCL shows great potential for the accurate retrieval of line center frequencies in a spectral region that is currently outside the reach of broadly tunable cw sources, either based on difference frequency generation or optical parametric oscillation. The approach described here can be straightforwardly extended up to 12 {\mu}m, which is the current wavelength limit for commercial cw EC-QCLs.

KW - physics.ins-det

KW - physics.optics

M3 - Article

SN - 1996-0948

JO - Applied Physics

JF - Applied Physics

ER -

Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser

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