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MODELLING AND REMOVING DIGITIZER NONLINEARITY FOR ACCURATE DUAL FREQUENCY COMB SPECTROSCOPY

Published

Author(s)

Nathan Malarich, Kevin Cossel, JEAN-DANIEL DESCHENES, Fabrizio Giorgetta, Brian Washburn, Nathan Newbury, Ian Coddington, Jerome Genest

Abstract

Operation of any dual-comb spectrometer requires digitization of the interference signal before further processing. Nonlinearities in the analog-to-digital conversion can alter the apparent gas concentration by multiple percent, limiting both precision and accuracy of this technique. This work describes both the measurement of digitizer nonlinearity and the development of a model that quantitatively describes observed concentration bias over a range of conditions. We present hardware methods to suppress digitizer-induced bias of concentration retrievals below 0.1%.
Citation
Optics Express
Volume
31
Issue
18

Citation

Malarich, N. , Cossel, K. , Deschenes, J. , Giorgetta, F. , Washburn, B. , Newbury, N. , Coddington, I. and Genest, J. (2023), MODELLING AND REMOVING DIGITIZER NONLINEARITY FOR ACCURATE DUAL FREQUENCY COMB SPECTROSCOPY, Optics Express, [online], https://doi.org/10.1364/OE.497497, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=936765 (Accessed June 20, 2024)

Issues

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Created August 15, 2023, Updated December 2, 2023