Physical Review A

Suppression of the high-frequency recoil component in optical Ramsey-fringe spectroscopy

Takayuki Kurosu, Atsuo Morinaga

Published Apr 1, 1992• 13 citations

Abstract

The high-frequency recoil component is suppressed in the optical Ramsey resonance by utilizing optical pumping from the ground state to one of the magnetic sublevels of the upper state. This method requires no extra laser for suppression. With a moderate pump power and an exact tuning of the magnetic field, the high-frequency recoil component of the Ca intercombination line $^{1}$${\mathit{S}}_{0\mathrm{\ensuremath{-}}}^{3}$${\mathit{P}}_{1}$ was suppressed completely.

DOI: 10.1103/physreva.45.4799

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Physical Review A

Suppression of the high-frequency recoil component in optical Ramsey-fringe spectroscopy

Takayuki Kurosu, Atsuo Morinaga

Published Apr 1, 1992• 13 citations

Publisher

Abstract

^{1}$${\mathit{S}}_{0\mathrm{\ensuremath{-}}}^{3}$${\mathit{P}}_{1}

was suppressed completely.

DOI: 10.1103/physreva.45.4799

Related papers

Modified hyper-Ramsey methods for the elimination of probe shifts in optical clocks

Richard Hobson, William Bowden, S. A. King +3 more

We develop a method of modified hyper-Ramsey spectroscopy in optical clocks, achieving complete immunity to the frequency shifts induced by the probing fields themselves. Using particular pulse sequences with tailored phases, frequencies, and durations, we can derive an error signal centered exactly at the unperturbed atomic resonance with a steep discriminant which is robust against variations in the probe shift. We experimentally investigate the scheme using the magnetically induced ${}^{1}{S}_{0}\text{\ensuremath{-}}{}^{3}{P}_{0}$ transition in $^{88}\mathrm{Sr}$ , demonstrating automatic suppression of a sizable $2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}13}$ probe Stark shift to below $1\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}16}$ even with very large errors in shift compensation.We develop a method of modified hyper-Ramsey spectroscopy in optical clocks, achieving complete immunity to the frequency shifts induced by the probing fields themselves. Using particular pulse sequences with tailored phases, frequencies, and durations, we can derive an error signal centered exactly at the unperturbed atomic resonance with a steep discriminant which is robust against variations in the probe shift. We experimentally investigate the scheme using the magnetically induced ${}^{1}{S}_{0}\text{\ensuremath{-}}{}^{3}{P}_{0}$ transition in $^{88}\mathrm{Sr}$, demonstrating automatic suppression of a sizable $2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}13}$ probe Stark shift to below $1\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}16}$ even with very large errors in shift compensation.

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^{88}\mathrm{Sr}

, demonstrating automatic suppression of a sizable $2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}13}$ probe Stark shift to below $1\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}16}$ even with very large errors in shift compensation.

^{3}P_{1}

state through the

^{3}S_{1}

state into the

^{3}P_{0}

or the

^{3}P_{2}

states. The suppression of the low-frequency recoil component could be deduced in saturated absorption from a narrowing and shift of the Lamb dip as well as observed directly in Ramsey fringe spectroscopy when the recoil doublet was resovled.

{(}^{1}

{\mathit{S}}_{0}

${\mathrm{\ensuremath{-}}}^{3}$

{\mathit{P}}_{1}

) of Ca. It was clearly observed that the phase shift is in proportion to the field power and in inverse proportion to the detuning frequency of the laser. The proportionality coefficient obtained was in good agreement with the theoretical one.