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Proceedings Paper

The Iodine Stabilized Laser As A Realization Of The Length Unit
Author(s): Howard P. Layer
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Paper Abstract

The iodine stabilized helium-neon laser is the most accurate and stable standard of length that is available for general metrological use today. Although the krypton discharge lamp is still the basis for international agreements which define the meter as the length standard, the independent reproducibility of the iodine stabilized helium-neon laser has been shown to exceed that of the krypton lamp when international intercomparisons are made. Because of its superior performance, the iodine stabilized helium-neon laser is used in most national standards laboratories to realize the standard of length. A value for its wavelength which is consistent with the value for the wavelength of the krypton lamp has been agreed upon by the metrological community through consultation with the International Bureau of Weights and Measures.

Paper Details

Date Published: 28 February 1978
PDF: 3 pages
Proc. SPIE 0129, Effective Utilization of Optics in Quality Assurance I, (28 February 1978); doi: 10.1117/12.956008
Show Author Affiliations
Howard P. Layer, National Bureau of Standards (United States)

Published in SPIE Proceedings Vol. 0129:
Effective Utilization of Optics in Quality Assurance I
Jose Cruz, Editor(s)

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