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Optics Letters

Optics Letters


  • Vol. 23, Iss. 12 — Jun. 15, 1998
  • pp: 957–959

Doppler-free two-photon spectrum of SF6 for metrological purposes

F. Herlemont, M. Khelkhal, J. Legrand, and G. Pierre  »View Author Affiliations

Optics Letters, Vol. 23, Issue 12, pp. 957-959 (1998)

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We report on our systematic investigation of strong Doppler-free two-photon absorption in the middle infrared. The absorption frequencies for two counterpropagating waves of identical frequencies are predicted. Five of these transitions were observed with sub-Doppler resolution with a sideband CO2 laser and were measured with 10-kHz accuracy. Knowledge of these strong two-photon absorptions frequencies will allow the improvement of secondary frequency standards in the infrared.

© 1998 Optical Society of America

OCIS Codes
(120.3940) Instrumentation, measurement, and metrology : Metrology
(170.5280) Medical optics and biotechnology : Photon migration
(300.0300) Spectroscopy : Spectroscopy

F. Herlemont, M. Khelkhal, J. Legrand, and G. Pierre, "Doppler-free two-photon spectrum of SF6 for metrological purposes," Opt. Lett. 23, 957-959 (1998)

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