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Elementary laboratory for determination of the Faraday rotation in Rubidium-85 vapor

B. Hamilton, Brandon J. Latronica, Michael Crescimanno

Bulletin of the American Physical SocietyOct 15, 20050 citations

Research of optimal pump light intensity in rubidium atomic magnetometers

Jiajia Li, Ding Zhichao, Zhiguo Wang +2 more

Laser TechnologyJan 1, 20160 citations

Optimization of a rubidium magnetometer based on nonlinear optical rotation

Lok Fai Chan, Louis Jacome, Srikanth Guttikonda +2 more

Bulletin of the American Physical SocietyNov 14, 20090 citations

Faraday-rotation Bell–Bloom atomic magnetometer using an alternating pump–probe beam

Songsong Li, Yi Zhang, Yuan Tian +2 more

We propose a scheme for a Bell–Bloom atomic magnetometer based on a single beam. In our approach, the light is periodically modulated synchronously with Larmor precession. As a result, the light that interacts with atoms is alternately polychromatic and monochromatic. When the light is polychromatic, the ±1st sidebands of the light are optically resonant with the atoms, and the atoms are polarized by pumping. When the light is monochromatic, a differential detection technique extracts the Faraday-rotation signal of the light, and the polarization of the light is probed. We demonstrate an experimental implementation of the Bell–Bloom magnetometer that achieves a sensitivity for magnetic-field detection of 0.25 pT/Hz1/2 at 1 Hz. Our scheme is suitable for developing compact, miniaturized magnetometers.We propose a scheme for a Bell–Bloom atomic magnetometer based on a single beam. In our approach, the light is periodically modulated synchronously with Larmor precession. As a result, the light that interacts with atoms is alternately polychromatic and monochromatic. When the light is polychromatic, the ±1st sidebands of the light are optically resonant with the atoms, and the atoms are polarized by pumping. When the light is monochromatic, a differential detection technique extracts the Faraday-rotation signal of the light, and the polarization of the light is probed. We demonstrate an experimental implementation of the Bell–Bloom magnetometer that achieves a sensitivity for magnetic-field detection of 0.25 pT/Hz1/2 at 1 Hz. Our scheme is suitable for developing compact, miniaturized magnetometers.

Journal of Applied PhysicsAug 25, 202116 citations

Research on the Key Technologies of the Compact Atomic Magnetometer

孙晓洁 SUN Xiao-jie, 寇军 Kou Jun, 张笑楠 ZHANG Xiao-nan +3 more

Acta Sinica Quantum OpticaJan 1, 20181 citation

Magnetoencephalography with a two-color pump-probe, fiber-coupled atomic magnetometer

Cort Johnson, Peter D. D. Schwindt, Michael P. Weisend

The authors have detected magnetic fields from the human brain with a compact, fiber-coupled rubidium spin-exchange-relaxation-free magnetometer. Optical pumping is performed on the D1 transition and Faraday rotation is measured on the D2 transition. The beams share an optical axis, with dichroic optics preparing beam polarizations appropriately. A sensitivity of <5 fT/Hz is achieved. Evoked responses resulting from median nerve and auditory stimulation were recorded with the atomic magnetometer. Recordings were validated by comparison with those taken by a commercial magnetoencephalography system. The design is amenable to arraying sensors around the head, providing a framework for noncryogenic, whole-head magnetoencephalography.The authors have detected magnetic fields from the human brain with a compact, fiber-coupled rubidium spin-exchange-relaxation-free magnetometer. Optical pumping is performed on the D1 transition and Faraday rotation is measured on the D2 transition. The beams share an optical axis, with dichroic optics preparing beam polarizations appropriately. A sensitivity of <5 fT/Hz is achieved. Evoked responses resulting from median nerve and auditory stimulation were recorded with the atomic magnetometer. Recordings were validated by comparison with those taken by a commercial magnetoencephalography system. The design is amenable to arraying sensors around the head, providing a framework for noncryogenic, whole-head magnetoencephalography.

Applied Physics LettersDec 13, 2010210 citations

Research of Rubidium Atomic Magnetometer Based on Faraday Rotation Detection

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