Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Conference on Precision Electromagnetic Measurements

Potential of the Single-Frequency CPT Resonances for Magnetic Field Measurement

Elena T. Taskova, S. Gateva, Emilia A. Alipieva

Published Jun 1, 2004• 0 citations
Publisher

Abstract

Coherent population trapping (CPT) resonances on degenerate two-level system of D1line of87Rb were investigated with single frequency laser excitation. Their sensitivity on stray magnetic fields was examined for linear, elliptical and circular laser polarization. Methodology for magnetic field measurement using the CPT resonance is proposed

DOI
10.1109/cpem.2004.305335

Related papers

Potential of the Single-Frequency CPT Resonances for Magnetic Field Measurement

Emilia A. Alipieva, S. Gateva, Elena T. Taskova

Coherent population trapping (CPT) resonances on degenerate two-level system of D/sub 1/ line of /sup 87/Rb were investigated with single-frequency laser excitation in Hanle configuration. Their sensitivity to stray magnetic fields was examined for linear, elliptical, and circular laser polarization. A methodology for magnetic field (MF) measurement using the CPT resonance is proposed. The sensitivity of the system to weak magnetic fields was evaluated and a magnetic field of 3 nT was unambiguously detected.

IEEE Transactions on Instrumentation and Measurement•Mar 21, 2005•16 citations

Coherent population trapping resonance on degenerate two-level system for magnetic field measurement

Emilia A. Alipieva, S. Gateva, Elena T. Taskova

Coherent population trapping (CPT) resonances on the degenerate two-level system of the (Fg=2→Fe=1) transition of the 87Rb D1 line were investigated in an uncoated vacuum cell by means of level-crossing type experiments-sweeping a magnetic field around zero value and using a single laser beam. The two-photon resonance manifests itself as fluorescence canceling when the system of levels is degenerate (at zero point of magnetic field). The influence of weak transverse magnetic fields on the amplitude and width of the resonance was investigated. The CPT resonances were observed with linear, circular and elliptical polarized laser light. Transverse magnetic field widens the resonances obtained by linear and circular polarization but splits the resonance created by slightly elliptically polarized laser light. The dependence of this splitting on the elliptical ratio and experimental geometry were investigated. Due to its narrow width and sensitivity to low magnetic fields (< 1 G) this resonance is very promising for small magnetic field measurement.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Jun 21, 2004•6 citations

Coherent population trapping for magnetic field measurements

Emilia A. Alipieva, C. Andreeva, Lachezar A. Avramov +17 more

The purpose of this communication is to summarize and compare the results obtained under the project "New all-optical systems and methods for magnetic and electromagnetic field measurement", financed by EC (contract G6RD-CT-2001-000642). The main aim of the project is investigation of the potential of different approaches based on the effect of Coherent Population Trapping (CPT) for magnetic field measurement. The investigated approaches are: (i) CPT prepared by coupling pairs of non-degenerate Zeeman sublevels belonging to the two ground-state hyperfine components of alkali atoms by means of polychromatic laser field; (ii) CPT prepared by coupling degenerate Zeeman sublevels belonging to a single ground-state hyperfine component of alkali atoms by means of single-frequency laser field of appropriate polarization at zero magnetic field (MF); and (iii) polychromatic laser field coupls pairs of non-degenerate Zeeman sublevels belonging to a single ground-state hyperfine level of alkali atoms.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Apr 22, 2005•7 citations

Influence of a.c. magnetic field on the CPT resonance obtained on two level degenerated system in Rb

Emilia A. Alipieva, S. Gateva, Elena T. Taskova

In this communication we present an investigation of the influence of an alternative magnetic field (a.c.MF) on the Coherent Population Trapping (CPT) resonances obtained in Hanle configuration. A.c.MF applied parallel to the sweeping magnetic field creates side-bands of the CPT resonance 1. Their position in dependence on the a.c.MF frequency and amplitude were investigated. This phenomenon was studied for the cases of linear and circular polarized laser excitation. Coherent signal due to the hexadecapole momentum created was detected. At high amplitudes of the a.c.MF alignment to orientation conversion was recorded.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Mar 2, 2007•1 citation

Single frequency coherent-population-trapping resonances for magnetic field measurement

S. Gateva, Emilia A. Alipieva, L. Petrov +2 more

Experimental investigation of the width, amplitude and shape of the Coherent Population Trapping (CPT) resonances for magnetic field measurements by means of a Hanle effect configuration (the single frequency CPT resonances) is presented. Different resonance width narrowing effects for increasing the sensitivity of the magnetometers are discussed. Numerical simulations based on density matrix formalism, which take into account the influence of the high rank polarization moments and the velocity distribution of the atoms have been performed for analysis of the shapes of the resonances.

Journal of Optoelectronics and Advanced Materials•Jan 1, 2008•5 citations

Polarization-dependent sensitivity of level-crossing, coherent-population-trapping resonances to stray magnetic fields

Arno Huss, Roland Lammegger, Laurentius Windholz +5 more

Coherent-population-trapping resonances within the degenerate two-level system of the F=2-->F′=1 transition of the 87Rb D1 line were investigated in an uncoated Rb vapor cell by means of level-crossing-type experiments. Tuning over the two-photon resonance is achieved sweeping a magnetic field around zero value. The influence of transverse magnetic fields on the amplitude and the width of the resonances, recorded in fluorescence and absorption, were investigated in the cases of excitation with linear, circular, and elliptical laser light polarization. A theoretical analysis was performed for the case of linearly polarized excitation, the results of which are in good agreement with the experiment.

Journal of the Optical Society of America B•Aug 31, 2006•41 citations
Coherent population trapping (CPT) resonances on degenerate two-level system of D1line of87Rb were investigated with single frequency laser excitation. Their sensitivity on stray magnetic fields was examined for linear, elliptical and circular laser polarization. Methodology for magnetic field measurement using the CPT resonance is proposed
Coherent population trapping (CPT) resonances on degenerate two-level system of D/sub 1/ line of /sup 87/Rb were investigated with single-frequency laser excitation in Hanle configuration. Their sensitivity to stray magnetic fields was examined for linear, elliptical, and circular laser polarization. A methodology for magnetic field (MF) measurement using the CPT resonance is proposed. The sensitivity of the system to weak magnetic fields was evaluated and a magnetic field of 3 nT was unambiguously detected.
Coherent population trapping (CPT) resonances on the degenerate two-level system of the (Fg=2→Fe=1) transition of the 87Rb D1 line were investigated in an uncoated vacuum cell by means of level-crossing type experiments-sweeping a magnetic field around zero value and using a single laser beam. The two-photon resonance manifests itself as fluorescence canceling when the system of levels is degenerate (at zero point of magnetic field). The influence of weak transverse magnetic fields on the amplitude and width of the resonance was investigated. The CPT resonances were observed with linear, circular and elliptical polarized laser light. Transverse magnetic field widens the resonances obtained by linear and circular polarization but splits the resonance created by slightly elliptically polarized laser light. The dependence of this splitting on the elliptical ratio and experimental geometry were investigated. Due to its narrow width and sensitivity to low magnetic fields (< 1 G) this resonance is very promising for small magnetic field measurement.
The purpose of this communication is to summarize and compare the results obtained under the project "New all-optical systems and methods for magnetic and electromagnetic field measurement", financed by EC (contract G6RD-CT-2001-000642). The main aim of the project is investigation of the potential of different approaches based on the effect of Coherent Population Trapping (CPT) for magnetic field measurement. The investigated approaches are: (i) CPT prepared by coupling pairs of non-degenerate Zeeman sublevels belonging to the two ground-state hyperfine components of alkali atoms by means of polychromatic laser field; (ii) CPT prepared by coupling degenerate Zeeman sublevels belonging to a single ground-state hyperfine component of alkali atoms by means of single-frequency laser field of appropriate polarization at zero magnetic field (MF); and (iii) polychromatic laser field coupls pairs of non-degenerate Zeeman sublevels belonging to a single ground-state hyperfine level of alkali atoms.
In this communication we present an investigation of the influence of an alternative magnetic field (a.c.MF) on the Coherent Population Trapping (CPT) resonances obtained in Hanle configuration. A.c.MF applied parallel to the sweeping magnetic field creates side-bands of the CPT resonance 1. Their position in dependence on the a.c.MF frequency and amplitude were investigated. This phenomenon was studied for the cases of linear and circular polarized laser excitation. Coherent signal due to the hexadecapole momentum created was detected. At high amplitudes of the a.c.MF alignment to orientation conversion was recorded.
Experimental investigation of the width, amplitude and shape of the Coherent Population Trapping (CPT) resonances for magnetic field measurements by means of a Hanle effect configuration (the single frequency CPT resonances) is presented. Different resonance width narrowing effects for increasing the sensitivity of the magnetometers are discussed. Numerical simulations based on density matrix formalism, which take into account the influence of the high rank polarization moments and the velocity distribution of the atoms have been performed for analysis of the shapes of the resonances.
Coherent-population-trapping resonances within the degenerate two-level system of the F=2-->F′=1 transition of the 87Rb D1 line were investigated in an uncoated Rb vapor cell by means of level-crossing-type experiments. Tuning over the two-photon resonance is achieved sweeping a magnetic field around zero value. The influence of transverse magnetic fields on the amplitude and the width of the resonances, recorded in fluorescence and absorption, were investigated in the cases of excitation with linear, circular, and elliptical laser light polarization. A theoretical analysis was performed for the case of linearly polarized excitation, the results of which are in good agreement with the experiment.