Title :
Phase-coherent measurement of the hydrogen 1S-2S frequency with an optical frequency interval divider chain
Author :
Udem, Thomas ; Huber, Andreas ; Weitz, Martin ; Leibfried, Dietrich ; König, Wolfgang ; Prevedelli, Marco ; Dimitriev, Alexander ; Geiger, Harald ; Hänsch, Theodor W.
Author_Institution :
Max-Planck-Inst. fur Quantenoptik, Garching bei Munchen, Germany
fDate :
4/1/1997 12:00:00 AM
Abstract :
We have measured the absolute frequency of the hydrogen 1S-2S two-photon resonance with an uncertainty of 3.4 parts in 1013 by comparing it with the 28th harmonic of a methane-stabilized 3.39 μm He-Ne-laser. A frequency mismatch of 2 THz at the 7th harmonic was bridged with the help of a phase-locked chain of five optical frequency interval dividers
Keywords :
constants; frequency dividers; frequency measurement; helium; hydrogen; measurement by laser beam; measurement standards; neon; optical harmonic generation; organic compounds; resonant states; two-photon spectroscopy; 2 THz; 28th harmonic; 3.39 mum; 7th harmonic; H; He-Ne; He-Ne laser; absolute frequency; frequency mismatch; hydrogen 1S-2S frequency; interval divider chain; methane-stabilized laser; optical frequency; optical frequency interval dividers; phase-coherent measurement; phase-locked chain; two-photon resonance; Atomic measurements; Frequency conversion; Frequency measurement; Hydrogen; Laser modes; Laser theory; Optical frequency conversion; Phase measurement; Resonance; Time measurement;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
