Modulation induced frequency shifts in a CPT-based atomic clock

Abstract

We investigate systematic errors associated with a common modulation technique used for phase sensitive detection of a coherent population trapping (CPT) resonance. In particular, we show that modification of the CPT resonance lineshape due to the presence of off-resonant fields leads to frequency shifts which may limit the stability of CPT-based atomic clocks. We also demonstrate that an alternative demodulation technique greatly reduces these effects.

14 pages, 7 figures

References in corpus (1)

• Theory of dark resonances for alkali vapors in a buffer-gas cell

Cited by in corpus (6)

• Coherent population trapping resonances with linearly polarized light for all-optical miniature atomic clocks
• Performance of a prototype atomic clock based on lin||lin coherent population trapping resonances in Rb atomic vapor
• Dynamic steady-state of periodically-driven quantum systems
• Comparison of 87Rb N-resonances for D1 and D2 transitions
• Dynamic continuous-wave spectroscopy of coherent population trapping at phase-jump modulation
• Lineshape Asymmetry for joint CPT and three photon N resonances