Title :
Accurate determination of OsO4 absolute frequency grid at 28/29 THz
Author :
Acef, O. ; Michaud, F. ; Rovera, Giovanni Daniele
Author_Institution :
BNM-LPTF, Obs. de Paris, Meudon, France
fDate :
4/1/1999 12:00:00 AM
Abstract :
We have performed a set of 10-12 level accuracy frequency measurements on 40 OsO4 transitions, which extend over the 1.2 THz optical range from the P(22) to the R(26) 12C16O2 lines of the 10.4 μm laser emission band. The measurements were made by heterodyning two OsO4 saturated, absorption-stabilized, CO2 laser radiations, with that of centimetric and millimetric sources, phase locked to a H-maser/Cs-clock. These measurements have been referenced against two OsO4 transitions known with 7×10-13 uncertainty
Keywords :
frequency standards; laser frequency stability; optical saturable absorption; osmium compounds; 10.4 micron; 28 to 29 THz; CO2; CO2 laser; OsO4; OsO4 absolute frequency grid; frequency stabilization; heterodyne frequency measurement; optical frequency standard; saturated absorption transition; Atom optics; Frequency measurement; Laser stability; Laser transitions; Metrology; Optical mixing; Optical saturation; Performance evaluation; Stimulated emission; Tunable circuits and devices;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
