Dynamic continuous-wave spectroscopy of coherent population trapping at phase-jump modulation

Abstract

A method of dynamic continuous-wave spectroscopy of coherent population trapping (CPT) resonances using phase modulation of the jump type is developed. The time evolution of the spectroscopic signal is investigated. A method for the formation of an error signal for frequency stabilization is proposed. We show that our approach has a reduced sensitivity to the lineshape asymmetry of the CPT resonance. The experimental results are in good qualitative agreement with theoretical predictions based on a mathematical model of a three-level $\Lambda$ system in a bichromatic field. This method can be used in atomic frequency standards (including chip-scale atomic clocks).

arXiv comment10 pages, 15 figures

References in corpus (4)

• Theory of dark resonances for alkali vapors in a buffer-gas cell
• Ultra-high Resolution Spectroscopy with atomic or molecular Dark Resonances: Exact steady-state lineshapes and asymptotic profiles in the adiabatic pulsed regime
• Dynamic steady-state of periodically-driven quantum systems
• Modulation induced frequency shifts in a CPT-based atomic clock

Cited by in corpus (1)

• In-situ ac Stark shift Detection in Light Storage Spectroscopy