Spectroscopy of the $^{1}S_{0}-\,^{3}P_{1}$ line in laser cooled Yb with an injection-locked diode laser at 1111.6nm

Nikita Kostylev, Clayton R. Locke, Michael Edmund Tobar, John J. McFerran

Published Oct 17, 2014• 0 citations

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Spectroscopy of the $^{1}S_{0}-\,^{3}P_{1}$ line in laser cooled Yb with an injection-locked diode laser at 1111.6nmSpectroscopy of the $^{1}S_{0}-\,^{3}P_{1}$ line in laser cooled Yb with an injection-locked diode laser at 1111.6nm

Nikita Kostylev, Clayton R. Locke, Michael Edmund Tobar, John J. McFerran

Published Oct 17, 2014• 0 citations

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Spectroscopy of the

^{1}S_{0}-\,^{3}P_{1}

line in laser cooled Yb with an injection-locked diode laser at 1111.6nm

Spectroscopy and laser cooling on the

{}^{1}S_{0}

1 S 0 –

\,^{3}P_{1}

3 P 1 line in Yb via an injection-locked diode laser at 1,111.6 nm

Observation of the

^{1}

_{0}

^3

_0

clock transition at 578 nm in atomic Yb

Anomalous saturated absorption providing a stable laser lock for

^{171}

Yb laser cooling

We identify an inverted Lamb dip in the saturated absorption spectroscopy of the

(6s^{2})

^{1}S_{0}

-

(6s6p)

^{3}P_{1}

transition in

^{171}

Yb. The signal has only been observed with the two hyperfine lines of this spin

I=\frac{1}{2}

isotope. For both lines the application of a dc magnetic field transforms a two-level scheme into a four-level scheme, with degeneracy only marginally lifted in the ground state. The atoms are excited through

\pi

transitions, while the de-excitation process completes a simple optical pumping scheme. However, the full explanation of the enhanced absorption is yet to be determined. The anomalous absorption signal is used to generate a dispersive curve for 556 nm laser stabilisation and the stabilised light cools

^{171}

Yb atoms in a two-stage magneto-optical trap, achieving temperatures below 50

\mu

K. The Doppler-free spectroscopy scheme is further used to measure isotopic frequency shifts and hyperfine separations for the intercombination line in Yb.

Spectroscopy of the forbidden

^1S_0 \rightarrow \,^3P_0

transition on ultra-cold ytterbium atoms

{10}^{7}

atoms in the blue MOT and transfer up to

70%

into the green MOT. The temperature for the odd isotope

^{171}\mathrm{Yb}

~1 \mathrm{mK}

in the blue MOT, and reduces by a factor of 40 in the green MOT.