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

Emilia A. Alipieva; Sanka V. Gateva; Elena T. Taskova

doi:10.1117/12.563195

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21 June 2004 Coherent population trapping resonance on degenerate two-level system for magnetic field measurement

Emilia A. Alipieva, Sanka V. Gateva, Elena T. Taskova

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Proceedings Volume 5449, Eighth International Conference on Laser and Laser Information Technologies; (2004) https://doi.org/10.1117/12.563195
Event: Eighth International Conference on Laser and Laser Information Technologies, 2003, Smolyan, Bulgaria

Abstract

Coherent population trapping (CPT) resonances on the degenerate two-level system of the (F_g=2→F_e=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.

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Emilia A. Alipieva, Sanka V. Gateva, and Elena T. Taskova "Coherent population trapping resonance on degenerate two-level system for magnetic field measurement", Proc. SPIE 5449, Eighth International Conference on Laser and Laser Information Technologies, (21 June 2004); https://doi.org/10.1117/12.563195

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