A NEW ABSOLUTE FREQUENCY REFERENCE GRID IN THE 28 THz RANGE

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Abstract
A new grid of frequency markers based on 12C16O2 lasers locked to OsO4 saturation peaks is presented. This grid extends from the P(22) to the R(26) CO2 laser lines of the 10.4 µm band and covers 1.12 THz with a 1 kHz accuracy for all the measured frequency differences. This set of measurements includes the 192 OsO4 line, which is in close coincidence with the P(14) 12C16O2 line and whose frequency has been connected to the Cesium primary standard with the same accuracy

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