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Optics Express

Optics Express

  • Editor: J. H. Eberly
  • Vol. 4, Iss. 2 — Jan. 18, 1999
  • pp: 67–76

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

A. Amy-Klein, L. F. Constantin, R. J. Butcher, C. Daussy, P. E. Durand, G. Nogues, and Ch. Chardonnet  »View Author Affiliations

Optics Express, Vol. 4, Issue 2, pp. 67-76 (1999)

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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.

© Optical Society of America

OCIS Codes
(020.3690) Atomic and molecular physics : Line shapes and shifts
(120.3940) Instrumentation, measurement, and metrology : Metrology
(270.4180) Quantum optics : Multiphoton processes
(300.6320) Spectroscopy : Spectroscopy, high-resolution

ToC Category:
Focus Issue: Laser controlled dynamics

Original Manuscript: December 3, 1998
Published: January 18, 1999

A. Amy-Klein, L. Constantin, C. Daussy, Ch. Chardonnet, R. Butcher, P. Durand, and G. Nogues, "Slow molecule detection or Ramsey fringes in two-photon spectroscopy: which is better for high resolution spectroscopy and metrology ?," Opt. Express 4, 67-76 (1999)

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