Title :
Absolute frequency measurements with a set of transportable methane optical frequency standards
Author :
Acef, O. ; Clairon, A. ; Rovera, G.D. ; Ducos, F. ; Hilico, L. ; Kramer, G. ; Lipphardt, B. ; Shelkovnikov, A. ; Kovalchuk, Evgeny ; Petrukhin, E. ; Tyurikov, D. ; Petrovskiy, M. ; Gubin, M. ; Felder, R. ; Gill, P. ; Lea, S.
Author_Institution :
BNM-LPTF, Obs. de Paris, Meudon, France
Abstract :
For the first time absolute frequency measurements (AFM) referenced to Cs primary standards with a set of 3 double-mode He-Ne/CH 4 transportable optical frequency standards (TOFS, λ=3.39 μm, ν=88 THz) were carried out. The radio-optical frequency chain (ROFC) and the 29-THz CO2/OsO4 secondary frequency standard of BNM-LPTF (France) and the ROFC of PTB were involved in the experiment. The level of accuracy achieved for these cross-measurements is better than 5*10-13
Keywords :
frequency standards; optical variables measurement; organic compounds; 29 THz; 3.39 mum; 88 THz; BNM-LPTF; CO2; CO2-OsO4; CO2/OsO4; Cs primary standards; France; He-Ne; OsO4; PTB; Physikalisch-Technische Bundesanstalt; absolute frequency measurements; cross-measurements; double-mode He-Ne/methane transportable optical frequency standards; optical frequency standards; radio-optical frequency chain; secondary frequency standard; transportable optical frequency standards; Calibration; Extraterrestrial measurements; Frequency measurement; Frequency synthesizers; Laboratories; Laser feedback; Laser tuning; Measurement standards; Optical devices; Spectroscopy;
Conference_Titel :
Frequency and Time Forum, 1999 and the IEEE International Frequency Control Symposium, 1999., Proceedings of the 1999 Joint Meeting of the European
Conference_Location :
Besancon
Print_ISBN :
0-7803-5400-1
DOI :
10.1109/FREQ.1999.841411
