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Author Hafiz, Moustafa ♦ Coget, Grégoire ♦ Clercq, Emeric ♦ Boudot, Rodolphe
Source Hyper Articles en Ligne (HAL)
Content type Text
File Format PDF
Language English
Subject Keyword spi ♦ Engineering Sciences [physics]/Other
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.
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-01-01
Volume Number 41
Issue Number 13
Page Count 4
Starting Page 2982
Ending Page 2985