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Evaluation of the CPT pseudo-resonance scheme for all-optical 87Rb frequency standard

Georgy A. Kazakov, Evelina Breschi, Boris G. Matisov +5 more

We investigate a novel approach to all-optical frequency standards, based on a combination of the coherent population trapping effect and signal discrimination at the maximum of absorption of the probe radiation. The physics underlying this approach is dark resonance splitting caused by interaction of the nuclear magnetic moment with an external magnetic field. Theoretically it has been shown that this approach under ideal conditions can lead to an important enhancement of the clock stability. Here we present an experimental evaluation of the scheme in view its future application in the domain of vapor-cell atomic clocks. The present results point out that high-performances short-term stability can be obtained only with a high spectral quality light source. In contrast, for our compact and low-consumption setup, the shot-noise limited short-term stability calculated is about 10-12τ-1/2, which is comparable to those presently measured for typical CPT-based atomic clocks.We investigate a novel approach to all-optical frequency standards, based on a combination of the coherent population trapping effect and signal discrimination at the maximum of absorption of the probe radiation. The physics underlying this approach is dark resonance splitting caused by interaction of the nuclear magnetic moment with an external magnetic field. Theoretically it has been shown that this approach under ideal conditions can lead to an important enhancement of the clock stability. Here we present an experimental evaluation of the scheme in view its future application in the domain of vapor-cell atomic clocks. The present results point out that high-performances short-term stability can be obtained only with a high spectral quality light source. In contrast, for our compact and low-consumption setup, the shot-noise limited short-term stability calculated is about 10-12τ-1/2, which is comparable to those presently measured for typical CPT-based atomic clocks.

European Frequency and Time ForumMar 27, 20061 citation

Pseudoresonance mechanism of all-optical frequency-standard operation (6 pages)

Georgy A. Kazakov, Boris G. Matisov

Physical Review AJan 1, 20051 citation

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

Novikova, I, Phillips, D F, Taichenachev, A V +3 more

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.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.

Jan 11, 200617 citations

Optical Signal Processing Method of the Rubidium-87 Quantum Frequency Standard

Anton Valov, Valentin I. Dudkin, Nikita A. Lukashev +1 more

Springer proceedings in physicsNov 27, 20200 citations

Optimization of laser radiation for CPT-based miniature frequency standard

К. А. Баранцев, A. N. Litvinov, Evgeniy Popov +1 more

The present work is dedicated to optimization of the laser radiation parameters and optically thickness of the gas cell for improvement of short-term stability of quantum frequency standard based on coherent population trapping effect in the cell with 87Rb working gas and buffer gas. The effects associated with the optical density of the medium are investigated, such as laser spectrum distortion and appearance of the light shifts of the coherent population trapping resonance due to different absorption of frequency components.The present work is dedicated to optimization of the laser radiation parameters and optically thickness of the gas cell for improvement of short-term stability of quantum frequency standard based on coherent population trapping effect in the cell with 87Rb working gas and buffer gas. The effects associated with the optical density of the medium are investigated, such as laser spectrum distortion and appearance of the light shifts of the coherent population trapping resonance due to different absorption of frequency components.

European Frequency and Time ForumApr 1, 20162 citations

The passive optically pumped Rb frequency standard: the laser approach

Jaques Vanier, C. Mandache

Applied Physics BMay 16, 2007122 citations

Evaluation of the CPT pseudo-resonance scheme for all-optical 87Rb frequency standard

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Evaluation of the CPT pseudo-resonance scheme for all-optical 87Rb frequency standard

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