Comb-locked cavity ring-down spectroscopy of CO2 at 2-micron wavelength
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2026
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866912930138685440 |
|---|---|
| author | Khan, Muhammad Asad D'Agostino, Vittorio Gravina, Stefania Gianfrani, Livio Castrillo, Antonio |
| author_facet | Khan, Muhammad Asad D'Agostino, Vittorio Gravina, Stefania Gianfrani, Livio Castrillo, Antonio |
| contents | We report on a comb-locked cavity ring-down spectrometer developed for high-precision, SI-traceable, molecular spectroscopy of air-broadened CO2 gas samples. The experimental setup relies on the use of a singly-resonant optical parametric oscillator that acts as an intermediate link between a 2 micron external-cavity diode laser and an optical frequency comb stabilized against a GPS-disciplined Rb-clock. Absorption spectra of the R(50) ro-vibrational component of the CO2 20012-00001 band have been recorded with high precision and fidelity. As a result of a refined spectral analysis, based on the implementation of the modified Hartmann-Tran profile, line center frequencies, pressure broadening and pressure shifting coefficients have been determined. Finally, we demonstrate the measurement of CO2 mole fractions with a subpromille statistical uncertainty |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_23812 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Comb-locked cavity ring-down spectroscopy of CO2 at 2-micron wavelength Khan, Muhammad Asad D'Agostino, Vittorio Gravina, Stefania Gianfrani, Livio Castrillo, Antonio Optics We report on a comb-locked cavity ring-down spectrometer developed for high-precision, SI-traceable, molecular spectroscopy of air-broadened CO2 gas samples. The experimental setup relies on the use of a singly-resonant optical parametric oscillator that acts as an intermediate link between a 2 micron external-cavity diode laser and an optical frequency comb stabilized against a GPS-disciplined Rb-clock. Absorption spectra of the R(50) ro-vibrational component of the CO2 20012-00001 band have been recorded with high precision and fidelity. As a result of a refined spectral analysis, based on the implementation of the modified Hartmann-Tran profile, line center frequencies, pressure broadening and pressure shifting coefficients have been determined. Finally, we demonstrate the measurement of CO2 mole fractions with a subpromille statistical uncertainty |
| title | Comb-locked cavity ring-down spectroscopy of CO2 at 2-micron wavelength |
| topic | Optics |
| url | https://arxiv.org/abs/2602.23812 |