Precision mid-infrared frequency combs and spectroscopic applications

D. Gatti; A. Castrillo; A. Gambetta; T. Sala; G. Galzerano; P. Laporta; L. Gianfrani; M. Marangoni

doi:10.1117/12.2008264

15 March 2013 Precision mid-infrared frequency combs and spectroscopic applications

D. Gatti, A. Castrillo, A. Gambetta, T. Sala, G. Galzerano, P. Laporta, L. Gianfrani, M. Marangoni

Proceedings Volume 8604, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XII; 86040O (2013) https://doi.org/10.1117/12.2008264
Event: SPIE LASE, 2013, San Francisco, California, United States

Abstract

The combination of frequency combs and quantum cascade lasers is opening new opportunities in the field of precision spectroscopy in the mid-infrared. Frequency combs allow quantum cascade lasers to be referenced to a highly repeatable, precise and absolute frequency axis. Repeatability is a key feature to obtain high quality measurements of absorption profiles and thus accurate determination of spectroscopic parameters, while absolute frequency calibration makes it possible the comparison of spectroscopic data acquired in different laboratories and at different times, as well as comparison with theoretical predictions or existing databases. This work reviews some of the main results achieved at 4.3 μm by investigation of a manifold of rovibrational lines of CO₂. Spectroscopic parameters such as line-centre frequencies, line intensity factors, pressure shift and pressure broadening coefficients are retrieved with an unprecedented quality from the metrological point of view.

Citation Download Citation

D. Gatti, A. Castrillo, A. Gambetta, T. Sala, G. Galzerano, P. Laporta, L. Gianfrani, and M. Marangoni "Precision mid-infrared frequency combs and spectroscopic applications", Proc. SPIE 8604, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XII, 86040O (15 March 2013); https://doi.org/10.1117/12.2008264

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