Reproducibility of Helium–Neon Laser Wavelengths at 633 nm
- 1 February 1968
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 7 (2), 289-293
- https://doi.org/10.1364/ao.7.000289
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 107. 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.Keywords
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