Pressure, Light, and Temperature Shifts in Optical Detection of 0-0 Hyperfine Resonance of Alkali Metals

Arditi, M.; Carver, Thomas R.

doi:10.1103/physrev.124.800

Cited by 151 publications

(44 citation statements)

References 21 publications

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“…The coating shift is negative and in qualitative agreement with previous results [25]. Furthermore we have measured the spectral position of the absorption minimum of the dark resonance as a function of light intensity for different values of r. These frequency shifts are referred to as light shift [39] and they depend on the characteristics of the interrogating light fields (intensity, polarization, one-photon laser detuning, and spectral distribution). These shifts can set the limit of the medium-term and long-term stability performance of CPT-based atomic clocks via the instability of the laser intensity and frequency.…”

Section: Light Shift Of the Dark Resonancesupporting

confidence: 72%

Light effects in the atomic-motion-induced Ramsey narrowing of dark resonances in wall-coated cells

et al. 2010

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We report on light shift and broadening in the atomic-motion-induced Ramsey narrowing of dark resonances prepared in alkali-metal vapors contained in wall-coated cells without buffer gas. The atomic-motion-induced Ramsey narrowing is due to the free motion of the polarized atomic spins in and out of the optical interaction region before spin relaxation. As a consequence of this effect, we observe a narrowing of the dark resonance linewidth as well as a reduction of the ground states' light shift when the volume of the interaction region decreases at constant optical intensity. The results can be intuitively interpreted as a dilution of the intensity effect similar to a pulsed interrogation due to the atomic motion. Finally the influence of this effect on the performance of compact atomic clocks is discussed.

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Section: Light Shift Of the Dark Resonancesupporting

confidence: 72%

Light effects in the atomic-motion-induced Ramsey narrowing of dark resonances in wall-coated cells

et al. 2010

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“…The uncertainty of this value is mainly due to the uncertainty of the exact value of the buffer gas pressure at the time of sealing. The shift compares well with measurements of the frequency shift of 87 Rb in Ar and Kr [11] and the frequency shift of 133 Cs in Ar, Kr and Xe [12]. We checked the accuracy of our frequency reference (HP-5340A) by calculating the ground state hyperfine splitting of 87 Rb from measurements of dark resonances with the buffer gas argon (e. g. figure 4) taking into account the well-known pressure shift of −51 Hz/Torr [11] for argon and the shift due to the magnetic field and obtained agreement with the value for the hyperfine splitting taken from literature [8] within 200 Hz.…”

Section: Resultssupporting

confidence: 79%

Coherent dark states of rubidium 87 in a buffer gas using pulsed laser light

1998

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Abstract. The coherent dark resonance between the hyperfine levels F = 1, mF = 0 and F = 2, mF = 0 of the rubidium ground state has been observed experimentally with the light of a pulsed mode-locked diode laser operating at the D1 transition frequency. The resonance occurs whenever the pulse repetition frequency matches an integer fraction of the rubidium 87 ground state hyperfine splitting of 6.8 GHz. Spectra have been taken by varying the pulse repetition frequency. Using cells with argon as a buffer gas a linewidth as narrow as 149 Hz was obtained. The rubidium ground state decoherence cross section σ2 = 1

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“…Some small relaxation of the hyperfine or Zeeman transitions does occur due to collisions and for hyperfine transitions, the transition line is significantly shifted 16 and broadened. Typically, the buffer gas pressure is adjusted to balance relaxation from the walls, which is inversely proportional to the buffer gas pressure P, and relaxation from buffer gas collisions, which is proportional to P. The relaxation rate for a diffusion mode is then given by…”

Section: B Alkali Vapor Cellsmentioning

confidence: 99%