Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)

Frequency measurement of the 2S1/2 – 2D3/2 electric quadrupole transition in a single 171Yb+ ion

Stephen A. Webster, R. M. Godun, S. A. King, Guilong Huang, Barney Walton, Veronika Tsatourian, Helen S. Margolis, S.N. Lea, Patrick Robert Gill

Published Apr 1, 2009• 0 citations

Publisher

Abstract

We report on precision laser spectroscopy of the2S1/2(F = 0) -2D3/2(F = 2, mF= 0) clock transition in a single ion of171Yb+. The absolute value of the transition frequency, determined using an optical frequency comb referenced to a hydrogen maser, is 688 358 979 309 310 plusmn 9 Hz. This corresponds to a fractional uncertainty of 1.3 times 10-14.

DOI: 10.1109/freq.2009.5168157

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Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)

Frequency measurement of the 2S1/2 – 2D3/2 electric quadrupole transition in a single 171Yb+ ion

Stephen A. Webster, R. M. Godun, S. A. King, Guilong Huang, Barney Walton, Veronika Tsatourian, Helen S. Margolis, S.N. Lea, Patrick Robert Gill

Published Apr 1, 2009• 0 citations

Publisher

Abstract

DOI: 10.1109/freq.2009.5168157

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We experimentally demonstrate laser spectroscopy of the electric-quadrupole transition $6s{}^{2}{S}_{1/2}--5d{}^{2}{D}_{3/2}$ of a single trapped ${}^{171}\mathrm{Yb}$ ion. The probed transition has a natural linewidth of 3.1 Hz, and is at a wavelength of 435.5 nm. A ${}^{171}\mathrm{Yb}$ ion is laser cooled to the range of the Doppler limit in a radio-frequency Paul trap. The $F=0--{F}^{\ensuremath{'}}=2,$ ${m}_{{F}^{\ensuremath{'}}}=0$ hyperfine component of the ${}^{2}{S}_{1/2}{--}^{2}{D}_{3/2}$ transition is excited by a laser source whose frequency is controlled by an optical reference cavity of high intrinsic stability. The recoilless carrier component of the vibrational sideband spectrum is resolved with a minimum linewidth of approximately 80 Hz, corresponding to a fractional frequency resolution of $1.2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}13}.$ This resolution limit is attributed to laser frequency instability. The effective decoherence rates of the residual ion motion are inferred from the observation that the axial and two radial low-frequency first-order secular-vibration sidebands show minimum linewidths in the range of 0.2--1 kHz. Prospects for an optical frequency standard based on the investigated atomic system are discussed.We experimentally demonstrate laser spectroscopy of the electric-quadrupole transition $6s{}^{2}{S}_{1/2}--5d{}^{2}{D}_{3/2}$ of a single trapped ${}^{171}\mathrm{Yb}$ ion. The probed transition has a natural linewidth of 3.1 Hz, and is at a wavelength of 435.5 nm. A ${}^{171}\mathrm{Yb}$ ion is laser cooled to the range of the Doppler limit in a radio-frequency Paul trap. The $F=0--{F}^{\ensuremath{'}}=2,$ ${m}_{{F}^{\ensuremath{'}}}=0$ hyperfine component of the ${}^{2}{S}_{1/2}{--}^{2}{D}_{3/2}$ transition is excited by a laser source whose frequency is controlled by an optical reference cavity of high intrinsic stability. The recoilless carrier component of the vibrational sideband spectrum is resolved with a minimum linewidth of approximately 80 Hz, corresponding to a fractional frequency resolution of $1.2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}13}.$ This resolution limit is attributed to laser frequency instability. The effective decoherence rates of the residual ion motion are inferred from the observation that the axial and two radial low-frequency first-order secular-vibration sidebands show minimum linewidths in the range of 0.2--1 kHz. Prospects for an optical frequency standard based on the investigated atomic system are discussed.

Physical Review AApr 10, 200096 citations

We report on precision laser spectroscopy of the ${^{2}S}_{1/2}(F=0)\text{\ensuremath{-}}{^{2}F}_{7/2}(F=3,{m}_{F}=0)$ clock transition in a single ion of

{^{171}\text{Y}\text{b}}^{+}

. A linewidth of

<40\text{ }\text{Hz}

is observed and frequency instability due to fluctuation of the ac Stark shift is reduced through improved stability of the beam alignment. The absolute value of the transition frequency, determined using an optical frequency comb, is $642\text{ }121\text{ }496\text{ }772\text{ }657\ifmmode\pm\else\textpm\fi{}12\text{ }\text{Hz}$ with a fractional uncertainty of $2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}14}$. This is a factor of 50 better than the previously published value [Hosaka et al., IEEE Trans. Instrum. Meas. 54, 759 (2005)].

We experimentally demonstrate laser spectroscopy of the electric-quadrupole transition

6s{}^{2}{S}_{1/2}--5d{}^{2}{D}_{3/2}

of a single trapped

{}^{171}\mathrm{Yb}

ion. The probed transition has a natural linewidth of 3.1 Hz, and is at a wavelength of 435.5 nm. A

{}^{171}\mathrm{Yb}

ion is laser cooled to the range of the Doppler limit in a radio-frequency Paul trap. The $F=0--{F}^{\ensuremath{'}}=2,$ ${m}_{{F}^{\ensuremath{'}}}=0$ hyperfine component of the

{}^{2}{S}_{1/2}{--}^{2}{D}_{3/2}

transition is excited by a laser source whose frequency is controlled by an optical reference cavity of high intrinsic stability. The recoilless carrier component of the vibrational sideband spectrum is resolved with a minimum linewidth of approximately 80 Hz, corresponding to a fractional frequency resolution of $1.2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}13}.$ This resolution limit is attributed to laser frequency instability. The effective decoherence rates of the residual ion motion are inferred from the observation that the axial and two radial low-frequency first-order secular-vibration sidebands show minimum linewidths in the range of 0.2--1 kHz. Prospects for an optical frequency standard based on the investigated atomic system are discussed.