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A unique extremely thin cell (ETC) with the thickness of Cs atomic vapour layer in the range of 150-300 nm has been developed for the first time. All six hyperfine transitions of D 2 line (852 nm) of Cs, i.e. 6S 1/2 (F=3)->6P 3/2 (F=2-4) and 6S 1/2 (F=4)->6P 3/2 (F=3-5) are very well resolved in the transmission...
A standard semiconductor laser at 791 nm is optically stabilized onto the narrow intercombination line of Ba (natural width: 120 kHz) in a nearly all-optical scheme relying on the optical feedback induced in collinear polarization spectroscopy. Fast frequency fluctuations of the laser are reduced in spite of the finite response time of the atomic signal. By monitoring the frequency beat between...
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