Wavelength modulation laser spectroscopy of N2O at 17 µm
Using a mid-infrared quantum cascade laser and wavelength modulation absorption spectroscopy, we measure the frequencies of ro-vibrational transitions of N _2 O in the 17 µ m region with uncertainties below 5 MHz. These lines, corresponding to the bending mode of the molecule, can be used for calib...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/adb778 |
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| author | Y Wang J Rodewald O Lopez M Manceau B Darquié B E Sauer M R Tarbutt |
| author_facet | Y Wang J Rodewald O Lopez M Manceau B Darquié B E Sauer M R Tarbutt |
| author_sort | Y Wang |
| collection | DOAJ |
| description | Using a mid-infrared quantum cascade laser and wavelength modulation absorption spectroscopy, we measure the frequencies of ro-vibrational transitions of N _2 O in the 17 µ m region with uncertainties below 5 MHz. These lines, corresponding to the bending mode of the molecule, can be used for calibration of spectrometers in this spectral region. We present a model for the lineshapes of absorption features in wavelength modulation spectroscopy that takes into account Doppler broadening, collisional broadening, saturation of the absorption, and lineshape distortion due to frequency and intensity modulation. Combining our data with previous measurements, we provide a set of spectroscopic parameters for several vibrational states of N _2 O. The lines measured here fall in the same spectral region as a mid-infrared frequency reference that we are currently developing using trapped, ultracold molecules. With such a frequency reference, the spectroscopic methods demonstrated here have the potential to improve frequency calibration in this part of the spectrum. |
| format | Article |
| id | doaj-art-e6e770a9fe12424c9887c0d3ed9f8e6b |
| institution | OA Journals |
| issn | 1367-2630 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj-art-e6e770a9fe12424c9887c0d3ed9f8e6b2025-08-20T02:04:21ZengIOP PublishingNew Journal of Physics1367-26302025-01-0127202303810.1088/1367-2630/adb778Wavelength modulation laser spectroscopy of N2O at 17 µmY Wang0J Rodewald1O Lopez2https://orcid.org/0000-0003-3171-2863M Manceau3https://orcid.org/0000-0002-8319-5741B Darquié4https://orcid.org/0000-0002-8623-5817B E Sauer5https://orcid.org/0000-0002-3286-4853M R Tarbutt6https://orcid.org/0000-0003-2713-9531Center for Cold Matter, Imperial College London , London SW7 2AZ, United KingdomCenter for Cold Matter, Imperial College London , London SW7 2AZ, United KingdomLaboratoire de Physique des Lasers, CNRS, Université Sorbonne Paris Nord , 93430 Villetaneuse, FranceLaboratoire de Physique des Lasers, CNRS, Université Sorbonne Paris Nord , 93430 Villetaneuse, FranceLaboratoire de Physique des Lasers, CNRS, Université Sorbonne Paris Nord , 93430 Villetaneuse, FranceCenter for Cold Matter, Imperial College London , London SW7 2AZ, United KingdomCenter for Cold Matter, Imperial College London , London SW7 2AZ, United KingdomUsing a mid-infrared quantum cascade laser and wavelength modulation absorption spectroscopy, we measure the frequencies of ro-vibrational transitions of N _2 O in the 17 µ m region with uncertainties below 5 MHz. These lines, corresponding to the bending mode of the molecule, can be used for calibration of spectrometers in this spectral region. We present a model for the lineshapes of absorption features in wavelength modulation spectroscopy that takes into account Doppler broadening, collisional broadening, saturation of the absorption, and lineshape distortion due to frequency and intensity modulation. Combining our data with previous measurements, we provide a set of spectroscopic parameters for several vibrational states of N _2 O. The lines measured here fall in the same spectral region as a mid-infrared frequency reference that we are currently developing using trapped, ultracold molecules. With such a frequency reference, the spectroscopic methods demonstrated here have the potential to improve frequency calibration in this part of the spectrum.https://doi.org/10.1088/1367-2630/adb778mid-infraredlaser spectroscopyquantum cascade lasernitrous oxide |
| spellingShingle | Y Wang J Rodewald O Lopez M Manceau B Darquié B E Sauer M R Tarbutt Wavelength modulation laser spectroscopy of N2O at 17 µm New Journal of Physics mid-infrared laser spectroscopy quantum cascade laser nitrous oxide |
| title | Wavelength modulation laser spectroscopy of N2O at 17 µm |
| title_full | Wavelength modulation laser spectroscopy of N2O at 17 µm |
| title_fullStr | Wavelength modulation laser spectroscopy of N2O at 17 µm |
| title_full_unstemmed | Wavelength modulation laser spectroscopy of N2O at 17 µm |
| title_short | Wavelength modulation laser spectroscopy of N2O at 17 µm |
| title_sort | wavelength modulation laser spectroscopy of n2o at 17 µm |
| topic | mid-infrared laser spectroscopy quantum cascade laser nitrous oxide |
| url | https://doi.org/10.1088/1367-2630/adb778 |
| work_keys_str_mv | AT ywang wavelengthmodulationlaserspectroscopyofn2oat17μm AT jrodewald wavelengthmodulationlaserspectroscopyofn2oat17μm AT olopez wavelengthmodulationlaserspectroscopyofn2oat17μm AT mmanceau wavelengthmodulationlaserspectroscopyofn2oat17μm AT bdarquie wavelengthmodulationlaserspectroscopyofn2oat17μm AT besauer wavelengthmodulationlaserspectroscopyofn2oat17μm AT mrtarbutt wavelengthmodulationlaserspectroscopyofn2oat17μm |