ABSOLUTE FREQUENCY MEASUREMENTS OF THE 28- AND 78-μm cw WATER VAPOR LASER LINES
- 15 February 1970
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 16 (4) , 159-162
- https://doi.org/10.1063/1.1653143
Abstract
The two highest frequency measurements as yet reported are described. Frequencies of the 28‐ and 78‐μm cw water vapor laser lines were found to be 10.718073±0.000002 THz and 3.821775±0.000003 THz, respectively, by beating each of these radiations with the 337‐ and 373‐μm (0.89‐ and 0.80‐THz) radiation from an HCN laser, in a metal‐on‐metal point‐contact diode. The frequencies of the HCN laser were in turn measured by beating the 337‐μm radiation with 74‐GHz radiation and by measuring the 337‐ and 373‐μm frequency difference.Keywords
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