Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Absolute spectroscopy of N2O near 4.5 um with a comb-calibrated, frequency-swept quantum cascade laser spectrometer

Published

Author(s)

Kevin O. Knabe, Paul A. Williams, Fabrizio R. Giorgetta, Michael Radunsky, Chris Armacost, Sam Crivello, Nathan R. Newbury

Abstract

We present absolute line center frequencies for 24 fundamental nu-3 ro-vibrational P-branch transitions near 4.5 um in N2O with an absolute frequency uncertainty of 800 kHz. The spectra were acquired with a swept laser spectrometer consisting of an external-cavity quantum cascade laser whose instantaneous frequency was continuously tracked against a near-infrared frequency comb. The measured absorbance profiles have a well-calibrated frequency axis, and are fitted to determine absolute line center values. We discuss the main sources of uncertainty.
Citation
Optics Express
Volume
21
Issue
1

Keywords

Spectroscopy, quantum cascade laser, nitrous oxide, N2O, optical frequency comb, mid-infrared

Citation

Knabe, K. , Williams, P. , Giorgetta, F. , Radunsky, M. , Armacost, C. , Crivello, S. and Newbury, N. (2013), Absolute spectroscopy of N2O near 4.5 um with a comb-calibrated, frequency-swept quantum cascade laser spectrometer, Optics Express, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=912727 (Accessed April 19, 2024)
Created January 13, 2013, Updated October 12, 2021