Comb-calibrated sub-Doppler spectroscopy with an external-cavity quantum cascade laser at 77 μm
Type
ArticleKAUST Department
Chemical Kinetics & Laser Sensors LaboratoryClean Combustion Research Center
Electrical Engineering Program
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division
KAUST Grant Number
OSR-2018-CARF-1975-06Date
2019-08-05Online Publication Date
2019-08-05Print Publication Date
2019-08-19Permanent link to this record
http://hdl.handle.net/10754/656525
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Show full item recordAbstract
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 kHzCitation
AlSaif, B., Gatti, D., Lamperti, M., Laporta, P., Farooq, A., & Marangoni, M. (2019). Comb-calibrated sub-Doppler spectroscopy with an external-cavity quantum cascade laser at 77 μm. Optics Express, 27(17), 23785. doi:10.1364/oe.27.023785Sponsors
King Abdullah University of Science and Technology (OSR-2018-CARF-1975-06), Fondazione Cariplo and Regione Lombardia (2016-1428).Publisher
The Optical SocietyJournal
Optics ExpressAdditional Links
https://www.osapublishing.org/abstract.cfm?URI=oe-27-17-23785ae974a485f413a2113503eed53cd6c53
10.1364/oe.27.023785