Title :
CO2/OsO4 lasers as frequency standards in the 29 THz range
Author_Institution :
Obs. de Paris, Meudon, France
fDate :
4/1/1997 12:00:00 AM
Abstract :
The CO2 lasers, frequency stabilized on OsO4 transitions around 29 THz, are successfully used as secondary references for visible frequency synthesis and also for high-accuracy spectroscopy in the infrared domain. The BNM-LPTF CO2/OsO4 frequency standards exhibit high metrological performances: a long term reproducibility of ±10 Hz (1σ=2×10-13) and a stability σy=6.6×10-14/√τ with a Flicker plateau of 4×10-15 (Δν/ν=0.1) for 300 s to 103 s averaging times. These results and a preliminary study of the main effects which can induce frequency shifts are reported
Keywords :
carbon compounds; frequency measurement; gas lasers; infrared spectroscopy; laser frequency stability; measurement standards; osmium compounds; 29 THz; BNM-LPTF; CO2-OsO4; CO2/OsO4 lasers; Flicker plateau; IR; OsO4 transitions; frequency shifts; frequency standards; infrared; metrological performance; reproducibility; secondary references; spectroscopy; stability; visible frequency synthesis; Absorption; Frequency measurement; Frequency modulation; Frequency synthesizers; Gas detectors; Infrared spectra; Laser noise; Laser stability; Reproducibility of results; Spectroscopy;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
