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PUBLICATIONS

Precision spectroscopy with frequency combs at 3.4 υm

Published

Author(s)

Esther Baumann, Fabrizio R. Giorgetta, William C. Swann, Alexander M. Zolot, Ian R. Coddington, Nathan R. Newbury

Abstract

We discuss precision spectroscopy with a comb-based spectrometer at 3.4 υm. Our goal is to explore comb-based spectroscopy as an alternative method for fast, highly resolved, accurate measurements of gas line shapes. The spectrometer uses dual 1.5 υm frequency combs down converted to 3.4 υm via difference frequency generation (DFG) with a stabilized 1 υm fiber laser. One 3.4 υm comb is transmitted through methane and heterodyned against the second, offset comb to measure the gas absorption and dispersion. Doppler-broadened methane spectral lines are measured to below 1 MHz uncertainty. We also discuss the higher sensitivity alternative of a comb-assisted swept-laser DFG spectrometer.
Proceedings Title
SPIE Optical Engineering + Applications 2011
Volume
7790
Conference Dates
August 21-26, 2011
Conference Location
San Diego, CA
Pub Type
Conferences

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Keywords

frequency combs, mid-IR, molecular spectroscopy
Metrology and Optical physics and communications

Citation

Baumann, E. , Giorgetta, F. , Swann, W. , Zolot, A. , Coddington, I. and Newbury, N. (2011), Precision spectroscopy with frequency combs at 3.4 υm, SPIE Optical Engineering + Applications 2011, San Diego, CA, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=909488 (Accessed October 7, 2025)

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Created August 2, 2011, Updated February 19, 2017
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