, Volume 57, Issue 2, pp 151-154

Modulation-free pump-probe spectroscopy of strontium atoms

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Abstract

We have performed polarization spectroscopy on the 5s2 1S0 →5s5p1P1 transition of atomic strontium. The signal is generated by saturation effects, rather than optical pumping, as the ground state is non-degenerate. This technique generated a dispersion-type lineshape suitable for laser stabilization, without the need for frequency modulation. The dependence of the amplitude and gradient on intensity and magnetic field were also investigated, and compared to a related technique based on the circular dichroism induced by a magnetic field.