NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
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 frequency measurements with a stabilized near-infrared optical frequency comb from a Cr:forsterite laser
Published
Author(s)
Kristan L. Corwin, I Thomann, A Bartels, Tasshi Dennis, W. Fox, William C. Swann, E. A. Curtis, C. W. Oates, G Wilpers, Sarah L. Gilbert, Leo W. Hollberg, Nathan R. Newbury, Scott A. Diddams, Jeffrey W. Nicholson, M. Yan
Abstract
A frequency comb is generated with a chromium-doped forsterite femtosecond laser, spectrally broadened in dispersion-shifted highly nonlinear fiber, and stabilized. The resultant evenly spaced comb of frequencies ranges from 1.1 to beyond 1.8 υm. The frequency comb was referenced simultaneously to the National Institute of Standards and Technology's optical frequency standard based on neutral calcium and to a hydrogen maser that is calibrated by a cesium atomic fountain clock. With this comb, we measured two frequency references in the telecommunications band: one half the frequency of the d/f crossover transition in 87Rb at 780 nm, and the methane Ņ2 + 2Ņ3 R(8) line at 1315 nm.
Corwin, K.
, Thomann, I.
, Bartels, A.
, Dennis, T.
, Fox, W.
, Swann, W.
, Curtis, E.
, Oates, C.
, Wilpers, G.
, Gilbert, S.
, Hollberg, L.
, Newbury, N.
, Diddams, S.
, Nicholson, J.
and Yan, M.
(2004),
Absolute frequency measurements with a stabilized near-infrared optical frequency comb from a Cr:forsterite laser, Optics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=31453
(Accessed October 8, 2025)