Skip to Main content Skip to Navigation
Journal articles

Doppler-free spectroscopy on Cs D1 line with a dual-frequency laser

Abstract : We report on Doppler-free laser spectroscopy in a Cs vapor cell using a dual-frequency laser system tuned on the Cs D1 line. Using counter-propagating beams with crossed linear polarizations, an original sign-reversal of the usual saturated absorption dip and large increase in Doppler-free atomic absorption is observed. This phenomenon is explained by coherent population trapping (CPT) effects. The impact of laser intensity and light polarization on absorption profiles is reported in both single-frequency and dual-frequency regimes. In the latter, frequency stabilization of two diode lasers was performed, yielding a beat-note fractional frequency stability at the level of 3×10 −12 at 1 s averaging time. These performances are about an order of magnitude better than those obtained using a conventional single-frequency saturated absorption scheme.
Document type :
Journal articles
Complete list of metadatas

Cited literature [23 references]  Display  Hide  Download
Contributor : Temps-Fréquence Femto-St <>
Submitted on : Thursday, May 16, 2019 - 12:31:31 PM
Last modification on : Tuesday, October 6, 2020 - 4:26:41 PM


Files produced by the author(s)



Moustafa Hafiz, Grégoire Coget, Emeric de Clercq, Rodolphe Boudot. Doppler-free spectroscopy on Cs D1 line with a dual-frequency laser. Optics Letters, Optical Society of America - OSA Publishing, 2016, 41 (13), pp.2982--2985. ⟨10.1364/OL.41.002982⟩. ⟨hal-02131483⟩



Record views


Files downloads