Knabe, K.
, Williams, P.
, Giorgetta, F.
, Armacost, C.
, Radunsky, M.
and Newbury, N.
(2012),
Frequency characterization of a swept and fixed-wavelength external-cavity quantum cascade laser by use of a frequency comb, Optics Express, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=911127
(Accessed October 23, 2025)
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.
Frequency characterization of a swept and fixed-wavelength external-cavity quantum cascade laser by use of a frequency comb
Published
Author(s)
, , , Chris Armacost, Michael Radunsky,
Abstract
The instantaneous optical frequency of an external-cavity quantum cascade laser (QCL) is characterized by comparison to a near-infrared frequency comb. Fluctuations in the instantaneous optical frequency are analyzed to determine the frequency noise power spectral density for the external-cavity QCL both during fixed wavelength operation and swept wavelength operation. This same combination of external-cavity QCL and comb can be applied to rapid, precise broadband spectroscopy.Citation
Optics Express
Volume
20
Issue
11
Pub Type
Journals
Download Paper
Keywords
continuous wave, cw, fiber comb, frequency comb, laser characterization, metrology, mid-infrared, mid-IR, QCL, quantum cascade laser spectroscopy
Citation
Issues
If you have any questions about this publication or are having problems accessing it, please contact [email protected].
Created May 21, 2012, Updated December 12, 2017