Related Experiment Video
Updated: Jun 17, 2026
09:38
Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
Published on: December 18, 2015
Reproducibility of helium-neon laser wavelengths at 633 nm
K D Mielenz1, K F Nefflen, W R Rowley
1National Bureauof Standards, Washington, DC 20234, USA.
Applied Optics
|January 12, 2010
Abstract:
Measurements, performed at NBS, NPL, and PTB, on helium-neon lasers stabilized on the Lamb dip, have shown that the wavelengths of these lasers fell within approximately 1 part in 10(7). Beyond this limit, different lasers were found to emit different wavelengths. In addition, the wavelength of a given laser may vary during the life of its discharge tube. Pressure shifts appear to be a major cause of these variations.
