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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 30, Iss. 24 — Dec. 15, 2005
  • pp: 3320–3322

Absolute frequency measurement of a SF6 two-photon line by use of a femtosecond optical comb and sum-frequency generation

Anne Amy-Klein, Andrei Goncharov, Mickaël Guinet, Christophe Daussy, Olivier Lopez, Alexander Shelkovnikov, and Christian Chardonnet  »View Author Affiliations

Optics Letters, Vol. 30, Issue 24, pp. 3320-3322 (2005)

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We demonstrate a new, simple technique for measuring IR frequencies near 30 THz by using a femtosecond (fs) laser optical comb and sum-frequency generation. The optical frequency is directly compared with the distance between two modes of the fs laser, and the resultant beat note is used to control this distance, which depends only on the repetition rate of the fs laser. The absolute frequency of a CO2 laser stabilized onto a SF6 two-photon line has been measured for the first time to the authors' knowledge. This line is an attractive alternative to the usual saturated absorption OsO4 resonances used for the stabilization of CO2 lasers. First results demonstrate a fractional Allan deviation of 3×10-14 at 1 s.

© 2005 Optical Society of America

OCIS Codes
(020.0020) Atomic and molecular physics : Atomic and molecular physics
(120.3940) Instrumentation, measurement, and metrology : Metrology

ToC Category:
Instrumentation, Measurement, and Metrology

Anne Amy-Klein, Andrei Goncharov, Mickaël Guinet, Christophe Daussy, Olivier Lopez, Alexander Shelkovnikov, and Christian Chardonnet, "Absolute frequency measurement of a SF6 two-photon line by use of a femtosecond optical comb and sum-frequency generation," Opt. Lett. 30, 3320-3322 (2005)

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