Central Ramsey fringe identification by means of an auxiliary optical field

Chuchelov, D. S.; Tsygankov, E. A.; Zibrov, S. A.; Vaskovskaya, M. I.; Vassiliev, V. V.; Zibrov, A. S.; Yudin, V. I.; Taĭchenachev, A. V.; Velichansky, V. L.

doi:10.1063/1.5111312

Cited by 6 publications

(2 citation statements)

References 19 publications

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“…However, frequency stabilization in atomic clocks is carried out by the central Ramsey resonance (δ R = 0). Therefore, the identification of the central fringe is an important technical problem, which has been considered in several works [38][39][40][41].…”

Section: Generalized Autobalanced Ramsey Spectroscopy Of Cpt Resonancesmentioning

confidence: 99%

Generalized Ramsey methods in the spectroscopy of coherent-population-trapping resonances

et al. 2020

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We present a rigorous justification for the applicability of the recently developed methods of generalized autobalanced Ramsey spectroscopy (GABRS) [V. I. Yudin et al., Phys. Rev. Appl. 9, 054034 (2018)] and combined error signal in Ramsey spectroscopy (CESRS) [V. I. Yudin et al., New J. Phys. 20, 123016 (2018)] for resonances of coherent population trapping (CPT). A protocol of modified combined error signal for CPT resonances is also proposed, in which two successive interrogations of atoms under different times of free evolution are integrated in one cycle. The implementation of the GABRS and CESRS methods in a compact atomic clock based on the CPT effect allows us to significantly suppress the light shift and its fluctuation, which will lead to an improvement in the long-term stability and accuracy of these devices. Moreover, these spectroscopic schemes are insensitive to various distortions of the pulse shape, relaxation processes, errors in the generation of phase jumps, etc., which provides their high reliability and immunity to perturbations.

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Section: Generalized Autobalanced Ramsey Spectroscopy Of Cpt Resonancesmentioning

confidence: 99%

Generalized Ramsey methods in the spectroscopy of coherent-population-trapping resonances

et al. 2020

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“…Due to the large decoherence rates {γ 12 , γ 13 , γ 24 , γ 34 } of magneto-sensitive transitions [42], the corresponding density matrix elements {ρ 12 , ρ 13 , ρ 24 , ρ 34 } can be ignored near the magnetoinsensitive two-photon resonance. Thus, using the adiabatically eliminating and resonance approximation [43]…”

Section: Gp Pd2mentioning

confidence: 99%

Temporal Spinwave Fabry-Perot Interferometry via Coherent Population Trapping

Fang,

Han,

Jiang

et al. 2020

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Ramsey spectroscopy via coherent population trapping (CPT) is essential in precision measurements. The conventional CPT-Ramsey fringes contain numbers of almost identical oscillations and so that it is difficult to identify the central fringe. Here, we experimentally demonstrate a temporal spinwave Fabry-Pérot interferometry via double-Λ CPT of laser-cooled 87 Rb atoms. Due to the constructive interference of temporal spinwaves, the transmission spectrum appears as a comb of equidistant peaks in frequency domain and thus the central Ramsey fringe can be easily identified. From the optical Bloch equations for our five-level double-Λ system, the transmission spectrum is analytically explained by the Fabry-Pérot interferometry of temporal spinwaves. Due to small amplitude difference between the two Landé factors, each peak splits into two when the external magnetic field is not too weak. This "unexpected" peak splitting can be employed to measure an unknown magnetic field without involving magneto-sensitive transitions.

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Temporal analog of Fabry-Pérot resonator via coherent population trapping

et al. 2021

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Ramsey spectroscopy via coherent population trapping (CPT) is essential in precision measurements. The conventional CPT-Ramsey fringes contain numbers of almost identical oscillations and so that it is difficult to identify the central fringe. Here we experimentally demonstrate a temporal analog of Fabry–Pérot resonator via double-Λ CPT of laser-cooled 87Rb atoms. By inserting a periodic CPT pulse train between the two CPT-Ramsey pulses, due to the constructive interference of spin coherence, the transmission spectrum appears as a comb of equidistant peaks in frequency domain and thus the central Ramsey fringe can be easily identified. From the five-level Bloch equations for our double-Λ system, we find that the multi-pulse CPT interference can be regarded as a temporal analog of Fabry–Pérot resonator. Because of the small amplitude difference between the two Landé g factors, each peak splits into two when the external magnetic field is not too weak. This splitting is exactly linear with the magnetic field strength and thus can be used for measuring a magnetic field without involving magneto-sensitive transitions.

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Central Ramsey fringe identification by means of an auxiliary optical field

Cited by 6 publications

References 19 publications

Generalized Ramsey methods in the spectroscopy of coherent-population-trapping resonances

Generalized Ramsey methods in the spectroscopy of coherent-population-trapping resonances

Temporal Spinwave Fabry-Perot Interferometry via Coherent Population Trapping

Temporal analog of Fabry-Pérot resonator via coherent population trapping

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