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Article Dans Une Revue Optics Express Année : 1999

Slow molecule detection or Ramsey fringes in two-photon spectroscopy: which is better for high resolution spectroscopy and metrology ?

Résumé

The CO2 laser locked onto a saturated absorption resonance of OsO4 provides a secondary frequency standard in the 10 μm region, with an accuracy of 50 Hz to 1 kHz. For averaging times less than 100 s its stability performance is better than the Hydrogen maser. This paper deals with the present attempt to increase this performance by using a two-photon molecular resonance as a reference. We begin with some preliminary and promising results on a two-photon line of SF6 leading to characteristics similar to those obtained with a saturation line of OsO4. Then two alternative methods to increase the resolution are presented : optical detection of slow molecules and a new development of the well-known Ramsey fringes. Metrological features are analyzed for both methods.

Dates et versions

hal-04318859 , version 1 (01-12-2023)

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Citer

A. Amy-Klein, L. Constantin, Christophe Daussy, Ch. Chardonnet, R. Butcher, et al.. Slow molecule detection or Ramsey fringes in two-photon spectroscopy: which is better for high resolution spectroscopy and metrology ?. Optics Express, 1999, 4 (2), pp.67. ⟨10.1364/OE.4.000067⟩. ⟨hal-04318859⟩
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