Comparison of 87Rb N-resonances for D1 and D2 transitions

Abstract

We report an experimental comparison of three-photon-absorption resonances (known as "N-resonances") for the D_1 and D_2 optical transitions of thermal 87Rb vapor. We find that the D_2 N-resonance has better contrast, a broader linewidth, and a more symmetric lineshape than the D_1 N-resonance. Taken together, these factors imply superior performance for frequency standards operating on alkali D_2 N-resonances, in contrast to coherent population trapping (CPT) resonances for which the D_2 transition provides poorer frequency standard performance than the D_1 transition.

arXiv comment3 pages, 4 figures

References in corpus (4)

• Theory of dark resonances for alkali vapors in a buffer-gas cell
• A novel absorption resonance for all-optical atomic clocks
• Cancellation of light-shifts in an N-resonance clock
• Modulation induced frequency shifts in a CPT-based atomic clock

Cited by in corpus (5)

• On decoherence of electromagnetically-induced transparency in atomic vapor
• Realistic theory of electromagnetically-induced transparency and slow light in a hot vapor of atoms undergoing collisions
• N -resonances in a buffered micrometric Rb cell: splitting in a strong magnetic field
• Sub-natural $N$-type Resonance in Cesium Atomic Vapor: splitting in magnetic fields
• Lineshape Asymmetry for joint CPT and three photon N resonances