Active Suppression of the Light Shift in an Atomic Clock Based on Coherent Population Trapping in 87Rb Vapor Using the Phase Jump Technique

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Resumo

The active suppression of light shift of the reference coherent population trapping (CPT) resonance in 87Rb vapor to improve the long-term stability of compact atomic clocks has been demonstrated experimentally. The approach is based on the phase jump technique used to synthesize an error signal, which is proportional to the light shift of the CPT resonance, from an optical transmission signal. The use of this error signal in an additional feedback loop allows one to stabilize the amplitude of a microwave signal for the phase modulation of laser radiation near a value at which the light shift of the CPT resonance is absent. This technique has made it possible to reduce the long-term instability of CPT atomic clocks in our experiments by a factor of 15 at an integration time of 10 000–20 000 s.

Sobre autores

D. Radnatarov

Novosibirsk State University

Email: d.radnatarov@gmail.com
2, Pirogova street, Novosibirsk, 630090

S. Kobtsev

Novosibirsk State University

Email: d.radnatarov@gmail.com
2, Pirogova street, Novosibirsk, 630090

V. Andryushkov

Novosibirsk State University

Email: d.radnatarov@gmail.com
2, Pirogova street, Novosibirsk, 630090

M. Basalaev

Novosibirsk State University;Institute of Laser Physics, Siberian Branch of the Russian Academy of Sciences;Novosibirsk State Technical University

Email: d.radnatarov@gmail.com
2, Pirogova street, Novosibirsk, 630090;15B, Lavrentyev prospect, Novosibirsk, 630090;20, K. Marx street, Novosibirsk, 630073

A. Taichenachev

Novosibirsk State University;Institute of Laser Physics, Siberian Branch of the Russian Academy of Sciences

Email: d.radnatarov@gmail.com
2, Pirogova street, Novosibirsk, 630090;15B, Lavrentyev prospect, Novosibirsk, 630090

M. Radchenko

Novosibirsk State University;Novosibirsk State Technical University

Autor responsável pela correspondência
Email: d.radnatarov@gmail.com
2, Pirogova street, Novosibirsk, 630090;20, K. Marx street, Novosibirsk, 630073

V. Yudin

Novosibirsk State University;Institute of Laser Physics, Siberian Branch of the Russian Academy of Sciences;Novosibirsk State Technical University

Email: viyudin@mail.ru
2, Pirogova street, Novosibirsk, 630090;15B, Lavrentyev prospect, Novosibirsk, 630090;20, K. Marx street, Novosibirsk, 630073

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